Finding the Fourth Proportional to 13,754,021,105.09, 18,980,613,401.82 and 7,813,899,557.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,754,021,105.09 : 18,980,613,401.82 = 7,813,899,557.57 : x
2. Step 2: Convert to fraction form
   13,754,021,105.09/18,980,613,401.82 = 7,813,899,557.57/x
3. Step 3: Cross multiply
   13,754,021,105.09x = 18,980,613,401.82 × 7,813,899,557.57
4. Step 4: Simplify right side
   13,754,021,105.09x = 148,312,606,662,904,741,888
5. Step 5: Solve for x
   x = 148,312,606,662,904,741,888/13,754,021,105.09
6. Step 6: Final answer
   x = 10,783,217,906.22