Finding the Fourth Proportional to 57,710.50, 79,640.73 and 31,214.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,710.50 : 79,640.73 = 31,214.50 : x
2. Step 2: Convert to fraction form
   57,710.50/79,640.73 = 31,214.50/x
3. Step 3: Cross multiply
   57,710.50x = 79,640.73 × 31,214.50
4. Step 4: Simplify right side
   57,710.50x = 2,485,945,566.59
5. Step 5: Solve for x
   x = 2,485,945,566.59/57,710.50
6. Step 6: Final answer
   x = 43,076.14