Finding the Fourth Proportional to 51,310.89, 70,789.55 and 31,160.16

Step by Step Solution

1. Step 1: Write the proportion equation
   51,310.89 : 70,789.55 = 31,160.16 : x
2. Step 2: Convert to fraction form
   51,310.89/70,789.55 = 31,160.16/x
3. Step 3: Cross multiply
   51,310.89x = 70,789.55 × 31,160.16
4. Step 4: Simplify right side
   51,310.89x = 2,205,813,548.53
5. Step 5: Solve for x
   x = 2,205,813,548.53/51,310.89
6. Step 6: Final answer
   x = 42,989.19