Finding the Fourth Proportional to 18,662.18, 28,002.99 and 8,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,662.18 : 28,002.99 = 8,271.50 : x
2. Step 2: Convert to fraction form
   18,662.18/28,002.99 = 8,271.50/x
3. Step 3: Cross multiply
   18,662.18x = 28,002.99 × 8,271.50
4. Step 4: Simplify right side
   18,662.18x = 231,626,731.79
5. Step 5: Solve for x
   x = 231,626,731.79/18,662.18
6. Step 6: Final answer
   x = 12,411.56