Finding the Fourth Proportional to 77,128.72, 115,710.90 and 32,756.92

Step by Step Solution

1. Step 1: Write the proportion equation
   77,128.72 : 115,710.90 = 32,756.92 : x
2. Step 2: Convert to fraction form
   77,128.72/115,710.90 = 32,756.92/x
3. Step 3: Cross multiply
   77,128.72x = 115,710.90 × 32,756.92
4. Step 4: Simplify right side
   77,128.72x = 3,790,332,694.43
5. Step 5: Solve for x
   x = 3,790,332,694.43/77,128.72
6. Step 6: Final answer
   x = 49,142.95