Finding the Fourth Proportional to 16,590.71, 22,879.31 and 12,807.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,590.71 : 22,879.31 = 12,807.60 : x
2. Step 2: Convert to fraction form
   16,590.71/22,879.31 = 12,807.60/x
3. Step 3: Cross multiply
   16,590.71x = 22,879.31 × 12,807.60
4. Step 4: Simplify right side
   16,590.71x = 293,028,986.72
5. Step 5: Solve for x
   x = 293,028,986.72/16,590.71
6. Step 6: Final answer
   x = 17,662.24