Finding the Fourth Proportional to 16,602.59, 24,868.76 and 13,426.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,602.59 : 24,868.76 = 13,426.40 : x
2. Step 2: Convert to fraction form
   16,602.59/24,868.76 = 13,426.40/x
3. Step 3: Cross multiply
   16,602.59x = 24,868.76 × 13,426.40
4. Step 4: Simplify right side
   16,602.59x = 333,897,828.49
5. Step 5: Solve for x
   x = 333,897,828.49/16,602.59
6. Step 6: Final answer
   x = 20,111.20