Finding the Fourth Proportional to 89,413.56, 123,402.51 and 57,674.73

Step by Step Solution

1. Step 1: Write the proportion equation
   89,413.56 : 123,402.51 = 57,674.73 : x
2. Step 2: Convert to fraction form
   89,413.56/123,402.51 = 57,674.73/x
3. Step 3: Cross multiply
   89,413.56x = 123,402.51 × 57,674.73
4. Step 4: Simplify right side
   89,413.56x = 7,117,206,445.57
5. Step 5: Solve for x
   x = 7,117,206,445.57/89,413.56
6. Step 6: Final answer
   x = 79,598.74