Finding the Fourth Proportional to 51,311.02, 70,789.71 and 31,160.29

Step by Step Solution

1. Step 1: Write the proportion equation
   51,311.02 : 70,789.71 = 31,160.29 : x
2. Step 2: Convert to fraction form
   51,311.02/70,789.71 = 31,160.29/x
3. Step 3: Cross multiply
   51,311.02x = 70,789.71 × 31,160.29
4. Step 4: Simplify right side
   51,311.02x = 2,205,827,892.62
5. Step 5: Solve for x
   x = 2,205,827,892.62/51,311.02
6. Step 6: Final answer
   x = 42,989.36