Finding the Fourth Proportional to 9,150.72, 12,644.48 and 7,302.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.72 : 12,644.48 = 7,302.40 : x
2. Step 2: Convert to fraction form
   9,150.72/12,644.48 = 7,302.40/x
3. Step 3: Cross multiply
   9,150.72x = 12,644.48 × 7,302.40
4. Step 4: Simplify right side
   9,150.72x = 92,335,050.75
5. Step 5: Solve for x
   x = 92,335,050.75/9,150.72
6. Step 6: Final answer
   x = 10,090.47