Finding the Fourth Proportional to 71,857.72, 99,164.69 and 41,645.13

Step by Step Solution

1. Step 1: Write the proportion equation
   71,857.72 : 99,164.69 = 41,645.13 : x
2. Step 2: Convert to fraction form
   71,857.72/99,164.69 = 41,645.13/x
3. Step 3: Cross multiply
   71,857.72x = 99,164.69 × 41,645.13
4. Step 4: Simplify right side
   71,857.72x = 4,129,726,406.46
5. Step 5: Solve for x
   x = 4,129,726,406.46/71,857.72
6. Step 6: Final answer
   x = 57,470.88