Finding the Fourth Proportional to 20,832,144.79, 28,758,328.61 and 13,874,401.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,832,144.79 : 28,758,328.61 = 13,874,401.12 : x
2. Step 2: Convert to fraction form
   20,832,144.79/28,758,328.61 = 13,874,401.12/x
3. Step 3: Cross multiply
   20,832,144.79x = 28,758,328.61 × 13,874,401.12
4. Step 4: Simplify right side
   20,832,144.79x = 399,004,586,606,540
5. Step 5: Solve for x
   x = 399,004,586,606,540/20,832,144.79
6. Step 6: Final answer
   x = 19,153,312.86