Finding the Fourth Proportional to 57,170.48, 85,406.92 and 45,496.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,170.48 : 85,406.92 = 45,496.72 : x
2. Step 2: Convert to fraction form
   57,170.48/85,406.92 = 45,496.72/x
3. Step 3: Cross multiply
   57,170.48x = 85,406.92 × 45,496.72
4. Step 4: Simplify right side
   57,170.48x = 3,885,734,725.30
5. Step 5: Solve for x
   x = 3,885,734,725.30/57,170.48
6. Step 6: Final answer
   x = 67,967.50