Finding the Fourth Proportional to 10,139.32, 13,992.35 and 5,663.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.32 : 13,992.35 = 5,663.43 : x
2. Step 2: Convert to fraction form
   10,139.32/13,992.35 = 5,663.43/x
3. Step 3: Cross multiply
   10,139.32x = 13,992.35 × 5,663.43
4. Step 4: Simplify right side
   10,139.32x = 79,244,666.44
5. Step 5: Solve for x
   x = 79,244,666.44/10,139.32
6. Step 6: Final answer
   x = 7,815.58