Finding the Fourth Proportional to 59,855.84, 89,255.71 and 56,912.61

Step by Step Solution

1. Step 1: Write the proportion equation
   59,855.84 : 89,255.71 = 56,912.61 : x
2. Step 2: Convert to fraction form
   59,855.84/89,255.71 = 56,912.61/x
3. Step 3: Cross multiply
   59,855.84x = 89,255.71 × 56,912.61
4. Step 4: Simplify right side
   59,855.84x = 5,079,775,413.50
5. Step 5: Solve for x
   x = 5,079,775,413.50/59,855.84
6. Step 6: Final answer
   x = 84,866.83