Finding the Fourth Proportional to 10,139.22, 13,992.15 and 5,663.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.22 : 13,992.15 = 5,663.14 : x
2. Step 2: Convert to fraction form
   10,139.22/13,992.15 = 5,663.14/x
3. Step 3: Cross multiply
   10,139.22x = 13,992.15 × 5,663.14
4. Step 4: Simplify right side
   10,139.22x = 79,239,504.35
5. Step 5: Solve for x
   x = 79,239,504.35/10,139.22
6. Step 6: Final answer
   x = 7,815.15