Finding the Fourth Proportional to 16,300.17, 22,487.54 and 9,921.65

Step by Step Solution

1. Step 1: Write the proportion equation
   16,300.17 : 22,487.54 = 9,921.65 : x
2. Step 2: Convert to fraction form
   16,300.17/22,487.54 = 9,921.65/x
3. Step 3: Cross multiply
   16,300.17x = 22,487.54 × 9,921.65
4. Step 4: Simplify right side
   16,300.17x = 223,113,339.20
5. Step 5: Solve for x
   x = 223,113,339.20/16,300.17
6. Step 6: Final answer
   x = 13,687.79