Finding the Fourth Proportional to 22,789.19, 31,450.65 and 12,719.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,789.19 : 31,450.65 = 12,719.59 : x
2. Step 2: Convert to fraction form
   22,789.19/31,450.65 = 12,719.59/x
3. Step 3: Cross multiply
   22,789.19x = 31,450.65 × 12,719.59
4. Step 4: Simplify right side
   22,789.19x = 400,039,376.34
5. Step 5: Solve for x
   x = 400,039,376.34/22,789.19
6. Step 6: Final answer
   x = 17,553.91