Finding the Fourth Proportional to 16,426.80, 23,789.70 and 16,426.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,426.80 : 23,789.70 = 16,426.80 : x
2. Step 2: Convert to fraction form
   16,426.80/23,789.70 = 16,426.80/x
3. Step 3: Cross multiply
   16,426.80x = 23,789.70 × 16,426.80
4. Step 4: Simplify right side
   16,426.80x = 390,788,643.96
5. Step 5: Solve for x
   x = 390,788,643.96/16,426.80
6. Step 6: Final answer
   x = 23,789.70