Finding the Fourth Proportional to 89,529.59, 123,593.09 and 56,840.42

Step by Step Solution

1. Step 1: Write the proportion equation
   89,529.59 : 123,593.09 = 56,840.42 : x
2. Step 2: Convert to fraction form
   89,529.59/123,593.09 = 56,840.42/x
3. Step 3: Cross multiply
   89,529.59x = 123,593.09 × 56,840.42
4. Step 4: Simplify right side
   89,529.59x = 7,025,082,242.53
5. Step 5: Solve for x
   x = 7,025,082,242.53/89,529.59
6. Step 6: Final answer
   x = 78,466.60