Finding the Fourth Proportional to 85,494.56, 128,244.01 and 40,505.37

Step by Step Solution

1. Step 1: Write the proportion equation
   85,494.56 : 128,244.01 = 40,505.37 : x
2. Step 2: Convert to fraction form
   85,494.56/128,244.01 = 40,505.37/x
3. Step 3: Cross multiply
   85,494.56x = 128,244.01 × 40,505.37
4. Step 4: Simplify right side
   85,494.56x = 5,194,570,569.10
5. Step 5: Solve for x
   x = 5,194,570,569.10/85,494.56
6. Step 6: Final answer
   x = 60,759.08