Finding the Fourth Proportional to 65,188.12, 89,960.88 and 42,541.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,188.12 : 89,960.88 = 42,541.60 : x
2. Step 2: Convert to fraction form
   65,188.12/89,960.88 = 42,541.60/x
3. Step 3: Cross multiply
   65,188.12x = 89,960.88 × 42,541.60
4. Step 4: Simplify right side
   65,188.12x = 3,827,079,772.61
5. Step 5: Solve for x
   x = 3,827,079,772.61/65,188.12
6. Step 6: Final answer
   x = 58,708.24