Finding the Fourth Proportional to 51,426.83, 71,036.78 and 39,469.61

Step by Step Solution

1. Step 1: Write the proportion equation
   51,426.83 : 71,036.78 = 39,469.61 : x
2. Step 2: Convert to fraction form
   51,426.83/71,036.78 = 39,469.61/x
3. Step 3: Cross multiply
   51,426.83x = 71,036.78 × 39,469.61
4. Step 4: Simplify right side
   51,426.83x = 2,803,793,449.72
5. Step 5: Solve for x
   x = 2,803,793,449.72/51,426.83
6. Step 6: Final answer
   x = 54,520.06