Finding the Fourth Proportional to 12,789.63, 19,213.61 and 12,264.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,789.63 : 19,213.61 = 12,264.75 : x
2. Step 2: Convert to fraction form
   12,789.63/19,213.61 = 12,264.75/x
3. Step 3: Cross multiply
   12,789.63x = 19,213.61 × 12,264.75
4. Step 4: Simplify right side
   12,789.63x = 235,650,061.92
5. Step 5: Solve for x
   x = 235,650,061.92/12,789.63
6. Step 6: Final answer
   x = 18,425.09