Finding the Fourth Proportional to 89,442.45, 123,442.29 and 57,703.68

Step by Step Solution

1. Step 1: Write the proportion equation
   89,442.45 : 123,442.29 = 57,703.68 : x
2. Step 2: Convert to fraction form
   89,442.45/123,442.29 = 57,703.68/x
3. Step 3: Cross multiply
   89,442.45x = 123,442.29 × 57,703.68
4. Step 4: Simplify right side
   89,442.45x = 7,123,074,400.63
5. Step 5: Solve for x
   x = 7,123,074,400.63/89,442.45
6. Step 6: Final answer
   x = 79,638.63