Finding the Fourth Proportional to 57,085.55, 85,517.52 and 42,065.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,085.55 : 85,517.52 = 42,065.42 : x
2. Step 2: Convert to fraction form
   57,085.55/85,517.52 = 42,065.42/x
3. Step 3: Cross multiply
   57,085.55x = 85,517.52 × 42,065.42
4. Step 4: Simplify right side
   57,085.55x = 3,597,329,968.57
5. Step 5: Solve for x
   x = 3,597,329,968.57/57,085.55
6. Step 6: Final answer
   x = 63,016.48