Finding the Fourth Proportional to 51,276.31, 70,761.32 and 28,306.15

Step by Step Solution

1. Step 1: Write the proportion equation
   51,276.31 : 70,761.32 = 28,306.15 : x
2. Step 2: Convert to fraction form
   51,276.31/70,761.32 = 28,306.15/x
3. Step 3: Cross multiply
   51,276.31x = 70,761.32 × 28,306.15
4. Step 4: Simplify right side
   51,276.31x = 2,002,980,538.12
5. Step 5: Solve for x
   x = 2,002,980,538.12/51,276.31
6. Step 6: Final answer
   x = 39,062.49