Finding the Fourth Proportional to 9,152.72, 12,630.60 and 5,375.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,152.72 : 12,630.60 = 5,375.20 : x
2. Step 2: Convert to fraction form
   9,152.72/12,630.60 = 5,375.20/x
3. Step 3: Cross multiply
   9,152.72x = 12,630.60 × 5,375.20
4. Step 4: Simplify right side
   9,152.72x = 67,892,001.12
5. Step 5: Solve for x
   x = 67,892,001.12/9,152.72
6. Step 6: Final answer
   x = 7,417.69