Finding the Fourth Proportional to 291,410.32, 437,004.72 and 139,451.40

Step by Step Solution

1. Step 1: Write the proportion equation
   291,410.32 : 437,004.72 = 139,451.40 : x
2. Step 2: Convert to fraction form
   291,410.32/437,004.72 = 139,451.40/x
3. Step 3: Cross multiply
   291,410.32x = 437,004.72 × 139,451.40
4. Step 4: Simplify right side
   291,410.32x = 60,940,920,010.61
5. Step 5: Solve for x
   x = 60,940,920,010.61/291,410.32
6. Step 6: Final answer
   x = 209,124.10