Finding the Fourth Proportional to 89,531.34, 123,595.50 and 56,842.17

Step by Step Solution

1. Step 1: Write the proportion equation
   89,531.34 : 123,595.50 = 56,842.17 : x
2. Step 2: Convert to fraction form
   89,531.34/123,595.50 = 56,842.17/x
3. Step 3: Cross multiply
   89,531.34x = 123,595.50 × 56,842.17
4. Step 4: Simplify right side
   89,531.34x = 7,025,436,422.24
5. Step 5: Solve for x
   x = 7,025,436,422.24/89,531.34
6. Step 6: Final answer
   x = 78,469.02