Finding the Fourth Proportional to 8,620.72, 11,892.52 and 7,375.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,620.72 : 11,892.52 = 7,375.15 : x
2. Step 2: Convert to fraction form
   8,620.72/11,892.52 = 7,375.15/x
3. Step 3: Cross multiply
   8,620.72x = 11,892.52 × 7,375.15
4. Step 4: Simplify right side
   8,620.72x = 87,709,118.88
5. Step 5: Solve for x
   x = 87,709,118.88/8,620.72
6. Step 6: Final answer
   x = 10,174.22