Finding the Fourth Proportional to 64,939.72, 89,619.42 and 41,057.68

Step by Step Solution

1. Step 1: Write the proportion equation
   64,939.72 : 89,619.42 = 41,057.68 : x
2. Step 2: Convert to fraction form
   64,939.72/89,619.42 = 41,057.68/x
3. Step 3: Cross multiply
   64,939.72x = 89,619.42 × 41,057.68
4. Step 4: Simplify right side
   64,939.72x = 3,679,565,468.15
5. Step 5: Solve for x
   x = 3,679,565,468.15/64,939.72
6. Step 6: Final answer
   x = 56,661.25