Finding the Fourth Proportional to 208,454.31, 287,665.83 and 112,960.17

Step by Step Solution

1. Step 1: Write the proportion equation
   208,454.31 : 287,665.83 = 112,960.17 : x
2. Step 2: Convert to fraction form
   208,454.31/287,665.83 = 112,960.17/x
3. Step 3: Cross multiply
   208,454.31x = 287,665.83 × 112,960.17
4. Step 4: Simplify right side
   208,454.31x = 32,494,781,059.99
5. Step 5: Solve for x
   x = 32,494,781,059.99/208,454.31
6. Step 6: Final answer
   x = 155,884.43