Finding the Fourth Proportional to 9,742.72, 13,445.12 and 5,551.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,742.72 : 13,445.12 = 5,551.04 : x
2. Step 2: Convert to fraction form
   9,742.72/13,445.12 = 5,551.04/x
3. Step 3: Cross multiply
   9,742.72x = 13,445.12 × 5,551.04
4. Step 4: Simplify right side
   9,742.72x = 74,634,398.92
5. Step 5: Solve for x
   x = 74,634,398.92/9,742.72
6. Step 6: Final answer
   x = 7,660.53