Finding the Fourth Proportional to 57,461.78, 79,347.12 and 42,380.59

Step by Step Solution

1. Step 1: Write the proportion equation
   57,461.78 : 79,347.12 = 42,380.59 : x
2. Step 2: Convert to fraction form
   57,461.78/79,347.12 = 42,380.59/x
3. Step 3: Cross multiply
   57,461.78x = 79,347.12 × 42,380.59
4. Step 4: Simplify right side
   57,461.78x = 3,362,777,760.40
5. Step 5: Solve for x
   x = 3,362,777,760.40/57,461.78
6. Step 6: Final answer
   x = 58,521.99