Finding the Fourth Proportional to 208,480.30, 287,702.72 and 112,986.98

Step by Step Solution

1. Step 1: Write the proportion equation
   208,480.30 : 287,702.72 = 112,986.98 : x
2. Step 2: Convert to fraction form
   208,480.30/287,702.72 = 112,986.98/x
3. Step 3: Cross multiply
   208,480.30x = 287,702.72 × 112,986.98
4. Step 4: Simplify right side
   208,480.30x = 32,506,661,470.59
5. Step 5: Solve for x
   x = 32,506,661,470.59/208,480.30
6. Step 6: Final answer
   x = 155,921.98