Finding the Fourth Proportional to 16,621.26, 22,929.62 and 9,903.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,621.26 : 22,929.62 = 9,903.12 : x
2. Step 2: Convert to fraction form
   16,621.26/22,929.62 = 9,903.12/x
3. Step 3: Cross multiply
   16,621.26x = 22,929.62 × 9,903.12
4. Step 4: Simplify right side
   16,621.26x = 227,074,728.90
5. Step 5: Solve for x
   x = 227,074,728.90/16,621.26
6. Step 6: Final answer
   x = 13,661.70