Finding the Fourth Proportional to 10,622.72, 15,908.56 and 5,931.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,622.72 : 15,908.56 = 5,931.20 : x
2. Step 2: Convert to fraction form
   10,622.72/15,908.56 = 5,931.20/x
3. Step 3: Cross multiply
   10,622.72x = 15,908.56 × 5,931.20
4. Step 4: Simplify right side
   10,622.72x = 94,356,851.07
5. Step 5: Solve for x
   x = 94,356,851.07/10,622.72
6. Step 6: Final answer
   x = 8,882.55