Finding the Fourth Proportional to 287,436.86, 396,663.24 and 156,613.82

Step by Step Solution

1. Step 1: Write the proportion equation
   287,436.86 : 396,663.24 = 156,613.82 : x
2. Step 2: Convert to fraction form
   287,436.86/396,663.24 = 156,613.82/x
3. Step 3: Cross multiply
   287,436.86x = 396,663.24 × 156,613.82
4. Step 4: Simplify right side
   287,436.86x = 62,122,945,269.98
5. Step 5: Solve for x
   x = 62,122,945,269.98/287,436.86
6. Step 6: Final answer
   x = 216,127.27