Finding the Fourth Proportional to 22,159.91, 33,187.02 and 12,780.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,159.91 : 33,187.02 = 12,780.32 : x
2. Step 2: Convert to fraction form
   22,159.91/33,187.02 = 12,780.32/x
3. Step 3: Cross multiply
   22,159.91x = 33,187.02 × 12,780.32
4. Step 4: Simplify right side
   22,159.91x = 424,140,521.59
5. Step 5: Solve for x
   x = 424,140,521.59/22,159.91
6. Step 6: Final answer
   x = 19,139.99