Finding the Fourth Proportional to 12,151.71, 18,184.25 and 8,404.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,151.71 : 18,184.25 = 8,404.25 : x
2. Step 2: Convert to fraction form
   12,151.71/18,184.25 = 8,404.25/x
3. Step 3: Cross multiply
   12,151.71x = 18,184.25 × 8,404.25
4. Step 4: Simplify right side
   12,151.71x = 152,824,958.61
5. Step 5: Solve for x
   x = 152,824,958.61/12,151.71
6. Step 6: Final answer
   x = 12,576.41