Finding the Fourth Proportional to 20,843.59, 28,761.06 and 12,662.95

Step by Step Solution

1. Step 1: Write the proportion equation
   20,843.59 : 28,761.06 = 12,662.95 : x
2. Step 2: Convert to fraction form
   20,843.59/28,761.06 = 12,662.95/x
3. Step 3: Cross multiply
   20,843.59x = 28,761.06 × 12,662.95
4. Step 4: Simplify right side
   20,843.59x = 364,199,864.73
5. Step 5: Solve for x
   x = 364,199,864.73/20,843.59
6. Step 6: Final answer
   x = 17,472.99