Finding the Fourth Proportional to 12,722.32, 17,558.43 and 7,417.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,722.32 : 17,558.43 = 7,417.18 : x
2. Step 2: Convert to fraction form
   12,722.32/17,558.43 = 7,417.18/x
3. Step 3: Cross multiply
   12,722.32x = 17,558.43 × 7,417.18
4. Step 4: Simplify right side
   12,722.32x = 130,234,035.83
5. Step 5: Solve for x
   x = 130,234,035.83/12,722.32
6. Step 6: Final answer
   x = 10,236.66