Finding the Fourth Proportional to 9,410.16, 12,987.72 and 8,940.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.16 : 12,987.72 = 8,940.24 : x
2. Step 2: Convert to fraction form
   9,410.16/12,987.72 = 8,940.24/x
3. Step 3: Cross multiply
   9,410.16x = 12,987.72 × 8,940.24
4. Step 4: Simplify right side
   9,410.16x = 116,113,333.85
5. Step 5: Solve for x
   x = 116,113,333.85/9,410.16
6. Step 6: Final answer
   x = 12,339.15