Finding the Fourth Proportional to 57,388.72, 79,174.24 and 42,317.04

Step by Step Solution

1. Step 1: Write the proportion equation
   57,388.72 : 79,174.24 = 42,317.04 : x
2. Step 2: Convert to fraction form
   57,388.72/79,174.24 = 42,317.04/x
3. Step 3: Cross multiply
   57,388.72x = 79,174.24 × 42,317.04
4. Step 4: Simplify right side
   57,388.72x = 3,350,419,481.05
5. Step 5: Solve for x
   x = 3,350,419,481.05/57,388.72
6. Step 6: Final answer
   x = 58,381.15