Finding the Fourth Proportional to 89,413.42, 123,345.03 and 68,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,413.42 : 123,345.03 = 68,155.78 : x
2. Step 2: Convert to fraction form
   89,413.42/123,345.03 = 68,155.78/x
3. Step 3: Cross multiply
   89,413.42x = 123,345.03 × 68,155.78
4. Step 4: Simplify right side
   89,413.42x = 8,406,676,728.77
5. Step 5: Solve for x
   x = 8,406,676,728.77/89,413.42
6. Step 6: Final answer
   x = 94,020.30