Finding the Fourth Proportional to 57,781.52, 86,612.81 and 28,162.71

Step by Step Solution

1. Step 1: Write the proportion equation
   57,781.52 : 86,612.81 = 28,162.71 : x
2. Step 2: Convert to fraction form
   57,781.52/86,612.81 = 28,162.71/x
3. Step 3: Cross multiply
   57,781.52x = 86,612.81 × 28,162.71
4. Step 4: Simplify right side
   57,781.52x = 2,439,251,309.50
5. Step 5: Solve for x
   x = 2,439,251,309.50/57,781.52
6. Step 6: Final answer
   x = 42,215.08