Finding the Fourth Proportional to 291,411.16, 437,141.49 and 81,049.10

Step by Step Solution

1. Step 1: Write the proportion equation
   291,411.16 : 437,141.49 = 81,049.10 : x
2. Step 2: Convert to fraction form
   291,411.16/437,141.49 = 81,049.10/x
3. Step 3: Cross multiply
   291,411.16x = 437,141.49 × 81,049.10
4. Step 4: Simplify right side
   291,411.16x = 35,429,922,151.45
5. Step 5: Solve for x
   x = 35,429,922,151.45/291,411.16
6. Step 6: Final answer
   x = 121,580.53