Finding the Fourth Proportional to 10,139.04, 13,990.86 and 5,662.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.04 : 13,990.86 = 5,662.38 : x
2. Step 2: Convert to fraction form
   10,139.04/13,990.86 = 5,662.38/x
3. Step 3: Cross multiply
   10,139.04x = 13,990.86 × 5,662.38
4. Step 4: Simplify right side
   10,139.04x = 79,221,565.85
5. Step 5: Solve for x
   x = 79,221,565.85/10,139.04
6. Step 6: Final answer
   x = 7,813.52