Finding the Fourth Proportional to 57,462.78, 79,348.50 and 42,381.60

Step by Step Solution

1. Step 1: Write the proportion equation
   57,462.78 : 79,348.50 = 42,381.60 : x
2. Step 2: Convert to fraction form
   57,462.78/79,348.50 = 42,381.60/x
3. Step 3: Cross multiply
   57,462.78x = 79,348.50 × 42,381.60
4. Step 4: Simplify right side
   57,462.78x = 3,362,916,387.60
5. Step 5: Solve for x
   x = 3,362,916,387.60/57,462.78
6. Step 6: Final answer
   x = 58,523.38