Finding the Fourth Proportional to 10,921.56, 16,375.38 and 5,079.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.56 : 16,375.38 = 5,079.96 : x
2. Step 2: Convert to fraction form
   10,921.56/16,375.38 = 5,079.96/x
3. Step 3: Cross multiply
   10,921.56x = 16,375.38 × 5,079.96
4. Step 4: Simplify right side
   10,921.56x = 83,186,275.38
5. Step 5: Solve for x
   x = 83,186,275.38/10,921.56
6. Step 6: Final answer
   x = 7,616.70