Finding the Fourth Proportional to 10,842.72, 14,956.56 and 6,648

Step by Step Solution

1. Step 1: Write the proportion equation
   10,842.72 : 14,956.56 = 6,648 : x
2. Step 2: Convert to fraction form
   10,842.72/14,956.56 = 6,648/x
3. Step 3: Cross multiply
   10,842.72x = 14,956.56 × 6,648
4. Step 4: Simplify right side
   10,842.72x = 99,431,210.88
5. Step 5: Solve for x
   x = 99,431,210.88/10,842.72
6. Step 6: Final answer
   x = 9,170.32