Finding the Fourth Proportional to 22,307.91, 30,786.53 and 12,747.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,307.91 : 30,786.53 = 12,747.57 : x
2. Step 2: Convert to fraction form
   22,307.91/30,786.53 = 12,747.57/x
3. Step 3: Cross multiply
   22,307.91x = 30,786.53 × 12,747.57
4. Step 4: Simplify right side
   22,307.91x = 392,453,382.49
5. Step 5: Solve for x
   x = 392,453,382.49/22,307.91
6. Step 6: Final answer
   x = 17,592.57