Finding the Fourth Proportional to 77,139.60, 115,686.72 and 32,766

Step by Step Solution

1. Step 1: Write the proportion equation
   77,139.60 : 115,686.72 = 32,766 : x
2. Step 2: Convert to fraction form
   77,139.60/115,686.72 = 32,766/x
3. Step 3: Cross multiply
   77,139.60x = 115,686.72 × 32,766
4. Step 4: Simplify right side
   77,139.60x = 3,790,591,067.52
5. Step 5: Solve for x
   x = 3,790,591,067.52/77,139.60
6. Step 6: Final answer
   x = 49,139.37