Finding the Fourth Proportional to 208,086.50, 287,157.31 and 112,591.10

Step by Step Solution

1. Step 1: Write the proportion equation
   208,086.50 : 287,157.31 = 112,591.10 : x
2. Step 2: Convert to fraction form
   208,086.50/287,157.31 = 112,591.10/x
3. Step 3: Cross multiply
   208,086.50x = 287,157.31 × 112,591.10
4. Step 4: Simplify right side
   208,086.50x = 32,331,357,405.94
5. Step 5: Solve for x
   x = 32,331,357,405.94/208,086.50
6. Step 6: Final answer
   x = 155,374.60