Finding the Fourth Proportional to 9,339,238.72, 12,887,594 and 5,418,691.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,339,238.72 : 12,887,594 = 5,418,691.12 : x
2. Step 2: Convert to fraction form
   9,339,238.72/12,887,594 = 5,418,691.12/x
3. Step 3: Cross multiply
   9,339,238.72x = 12,887,594 × 5,418,691.12
4. Step 4: Simplify right side
   9,339,238.72x = 69,833,891,165,965.28
5. Step 5: Solve for x
   x = 69,833,891,165,965.28/9,339,238.72
6. Step 6: Final answer
   x = 7,477,471.48