Finding the Fourth Proportional to 10,985.28, 16,470.60 and 5,707.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.28 : 16,470.60 = 5,707.32 : x
2. Step 2: Convert to fraction form
   10,985.28/16,470.60 = 5,707.32/x
3. Step 3: Cross multiply
   10,985.28x = 16,470.60 × 5,707.32
4. Step 4: Simplify right side
   10,985.28x = 94,002,984.79
5. Step 5: Solve for x
   x = 94,002,984.79/10,985.28
6. Step 6: Final answer
   x = 8,557.18