Finding the Fourth Proportional to 83,451.31, 115,162.47 and 47,640.55

Step by Step Solution

1. Step 1: Write the proportion equation
   83,451.31 : 115,162.47 = 47,640.55 : x
2. Step 2: Convert to fraction form
   83,451.31/115,162.47 = 47,640.55/x
3. Step 3: Cross multiply
   83,451.31x = 115,162.47 × 47,640.55
4. Step 4: Simplify right side
   83,451.31x = 5,486,403,022.73
5. Step 5: Solve for x
   x = 5,486,403,022.73/83,451.31
6. Step 6: Final answer
   x = 65,743.76