Finding the Fourth Proportional to 16,287.61, 22,476.98 and 9,213.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,287.61 : 22,476.98 = 9,213.88 : x
2. Step 2: Convert to fraction form
   16,287.61/22,476.98 = 9,213.88/x
3. Step 3: Cross multiply
   16,287.61x = 22,476.98 × 9,213.88
4. Step 4: Simplify right side
   16,287.61x = 207,100,196.48
5. Step 5: Solve for x
   x = 207,100,196.48/16,287.61
6. Step 6: Final answer
   x = 12,715.20