Finding the Fourth Proportional to 13,021,300.38, 17,967,742.70 and 7,139,386.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,021,300.38 : 17,967,742.70 = 7,139,386.82 : x
2. Step 2: Convert to fraction form
   13,021,300.38/17,967,742.70 = 7,139,386.82/x
3. Step 3: Cross multiply
   13,021,300.38x = 17,967,742.70 × 7,139,386.82
4. Step 4: Simplify right side
   13,021,300.38x = 128,278,665,417,531.22
5. Step 5: Solve for x
   x = 128,278,665,417,531.22/13,021,300.38
6. Step 6: Final answer
   x = 9,851,448.14