Finding the Fourth Proportional to 16,435.59, 22,686.98 and 9,723.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,435.59 : 22,686.98 = 9,723.57 : x
2. Step 2: Convert to fraction form
   16,435.59/22,686.98 = 9,723.57/x
3. Step 3: Cross multiply
   16,435.59x = 22,686.98 × 9,723.57
4. Step 4: Simplify right side
   16,435.59x = 220,598,389.50
5. Step 5: Solve for x
   x = 220,598,389.50/16,435.59
6. Step 6: Final answer
   x = 13,421.99