Finding the Fourth Proportional to 208,061.57, 287,124.86 and 117,436.55

Step by Step Solution

1. Step 1: Write the proportion equation
   208,061.57 : 287,124.86 = 117,436.55 : x
2. Step 2: Convert to fraction form
   208,061.57/287,124.86 = 117,436.55/x
3. Step 3: Cross multiply
   208,061.57x = 287,124.86 × 117,436.55
4. Step 4: Simplify right side
   208,061.57x = 33,718,950,954.83
5. Step 5: Solve for x
   x = 33,718,950,954.83/208,061.57
6. Step 6: Final answer
   x = 162,062.37