Finding the Fourth Proportional to 16,590.76, 22,917.06 and 12,391.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,590.76 : 22,917.06 = 12,391.72 : x
2. Step 2: Convert to fraction form
   16,590.76/22,917.06 = 12,391.72/x
3. Step 3: Cross multiply
   16,590.76x = 22,917.06 × 12,391.72
4. Step 4: Simplify right side
   16,590.76x = 283,981,790.74
5. Step 5: Solve for x
   x = 283,981,790.74/16,590.76
6. Step 6: Final answer
   x = 17,116.86