Finding the Fourth Proportional to 307,150.91, 424,084.38 and 215,465.12

Step by Step Solution

1. Step 1: Write the proportion equation
   307,150.91 : 424,084.38 = 215,465.12 : x
2. Step 2: Convert to fraction form
   307,150.91/424,084.38 = 215,465.12/x
3. Step 3: Cross multiply
   307,150.91x = 424,084.38 × 215,465.12
4. Step 4: Simplify right side
   307,150.91x = 91,375,391,826.83
5. Step 5: Solve for x
   x = 91,375,391,826.83/307,150.91
6. Step 6: Final answer
   x = 297,493.48