Finding the Fourth Proportional to 85,940.56, 128,912.49 and 29,782.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,940.56 : 128,912.49 = 29,782.50 : x
2. Step 2: Convert to fraction form
   85,940.56/128,912.49 = 29,782.50/x
3. Step 3: Cross multiply
   85,940.56x = 128,912.49 × 29,782.50
4. Step 4: Simplify right side
   85,940.56x = 3,839,335,847.52
5. Step 5: Solve for x
   x = 3,839,335,847.52/85,940.56
6. Step 6: Final answer
   x = 44,674.32