Finding the Fourth Proportional to 10,139.52, 13,991.16 and 5,662.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.52 : 13,991.16 = 5,662.71 : x
2. Step 2: Convert to fraction form
   10,139.52/13,991.16 = 5,662.71/x
3. Step 3: Cross multiply
   10,139.52x = 13,991.16 × 5,662.71
4. Step 4: Simplify right side
   10,139.52x = 79,227,881.64
5. Step 5: Solve for x
   x = 79,227,881.64/10,139.52
6. Step 6: Final answer
   x = 7,813.77