Finding the Fourth Proportional to 9,141.72, 12,621.42 and 7,467.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,141.72 : 12,621.42 = 7,467.15 : x
2. Step 2: Convert to fraction form
   9,141.72/12,621.42 = 7,467.15/x
3. Step 3: Cross multiply
   9,141.72x = 12,621.42 × 7,467.15
4. Step 4: Simplify right side
   9,141.72x = 94,246,036.35
5. Step 5: Solve for x
   x = 94,246,036.35/9,141.72
6. Step 6: Final answer
   x = 10,309.44