Finding the Fourth Proportional to 10,496.72, 14,485.56 and 5,781.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,496.72 : 14,485.56 = 5,781.20 : x
2. Step 2: Convert to fraction form
   10,496.72/14,485.56 = 5,781.20/x
3. Step 3: Cross multiply
   10,496.72x = 14,485.56 × 5,781.20
4. Step 4: Simplify right side
   10,496.72x = 83,743,919.47
5. Step 5: Solve for x
   x = 83,743,919.47/10,496.72
6. Step 6: Final answer
   x = 7,978.10