Finding the Fourth Proportional to 12,146.40, 18,214.20 and 5,574.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.40 : 18,214.20 = 5,574.72 : x
2. Step 2: Convert to fraction form
   12,146.40/18,214.20 = 5,574.72/x
3. Step 3: Cross multiply
   12,146.40x = 18,214.20 × 5,574.72
4. Step 4: Simplify right side
   12,146.40x = 101,539,065.02
5. Step 5: Solve for x
   x = 101,539,065.02/12,146.40
6. Step 6: Final answer
   x = 8,359.60