Finding the Fourth Proportional to 85,498.56, 128,250.02 and 40,509.37

Step by Step Solution

1. Step 1: Write the proportion equation
   85,498.56 : 128,250.02 = 40,509.37 : x
2. Step 2: Convert to fraction form
   85,498.56/128,250.02 = 40,509.37/x
3. Step 3: Cross multiply
   85,498.56x = 128,250.02 × 40,509.37
4. Step 4: Simplify right side
   85,498.56x = 5,195,327,512.69
5. Step 5: Solve for x
   x = 5,195,327,512.69/85,498.56
6. Step 6: Final answer
   x = 60,765.09