Finding the Fourth Proportional to 57,613.05, 86,285.30 and 55,617.57

Step by Step Solution

1. Step 1: Write the proportion equation
   57,613.05 : 86,285.30 = 55,617.57 : x
2. Step 2: Convert to fraction form
   57,613.05/86,285.30 = 55,617.57/x
3. Step 3: Cross multiply
   57,613.05x = 86,285.30 × 55,617.57
4. Step 4: Simplify right side
   57,613.05x = 4,798,978,434.63
5. Step 5: Solve for x
   x = 4,798,978,434.63/57,613.05
6. Step 6: Final answer
   x = 83,296.73