Finding the Fourth Proportional to 89,422.50, 133,929.63 and 42,708.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89,422.50 : 133,929.63 = 42,708.18 : x
2. Step 2: Convert to fraction form
   89,422.50/133,929.63 = 42,708.18/x
3. Step 3: Cross multiply
   89,422.50x = 133,929.63 × 42,708.18
4. Step 4: Simplify right side
   89,422.50x = 5,719,890,745.37
5. Step 5: Solve for x
   x = 5,719,890,745.37/89,422.50
6. Step 6: Final answer
   x = 63,964.78