Finding the Fourth Proportional to 9,174.72, 12,648.32 and 7,842.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,174.72 : 12,648.32 = 7,842.56 : x
2. Step 2: Convert to fraction form
   9,174.72/12,648.32 = 7,842.56/x
3. Step 3: Cross multiply
   9,174.72x = 12,648.32 × 7,842.56
4. Step 4: Simplify right side
   9,174.72x = 99,195,208.50
5. Step 5: Solve for x
   x = 99,195,208.50/9,174.72
6. Step 6: Final answer
   x = 10,811.80