Finding the Fourth Proportional to 10,057.67, 13,879.61 and 5,581.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,057.67 : 13,879.61 = 5,581.43 : x
2. Step 2: Convert to fraction form
   10,057.67/13,879.61 = 5,581.43/x
3. Step 3: Cross multiply
   10,057.67x = 13,879.61 × 5,581.43
4. Step 4: Simplify right side
   10,057.67x = 77,468,071.64
5. Step 5: Solve for x
   x = 77,468,071.64/10,057.67
6. Step 6: Final answer
   x = 7,702.39