Finding the Fourth Proportional to 123,487.86, 170,413.26 and 72,490.52

Step by Step Solution

1. Step 1: Write the proportion equation
   123,487.86 : 170,413.26 = 72,490.52 : x
2. Step 2: Convert to fraction form
   123,487.86/170,413.26 = 72,490.52/x
3. Step 3: Cross multiply
   123,487.86x = 170,413.26 × 72,490.52
4. Step 4: Simplify right side
   123,487.86x = 12,353,345,832.30
5. Step 5: Solve for x
   x = 12,353,345,832.30/123,487.86
6. Step 6: Final answer
   x = 100,036.93