Finding the Fourth Proportional to 16,470.80, 23,105.20 and 16,470.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,470.80 : 23,105.20 = 16,470.80 : x
2. Step 2: Convert to fraction form
   16,470.80/23,105.20 = 16,470.80/x
3. Step 3: Cross multiply
   16,470.80x = 23,105.20 × 16,470.80
4. Step 4: Simplify right side
   16,470.80x = 380,561,128.16
5. Step 5: Solve for x
   x = 380,561,128.16/16,470.80
6. Step 6: Final answer
   x = 23,105.20