Finding the Fourth Proportional to 22,371.31, 30,872.46 and 12,300.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,371.31 : 30,872.46 = 12,300.78 : x
2. Step 2: Convert to fraction form
   22,371.31/30,872.46 = 12,300.78/x
3. Step 3: Cross multiply
   22,371.31x = 30,872.46 × 12,300.78
4. Step 4: Simplify right side
   22,371.31x = 379,755,338.52
5. Step 5: Solve for x
   x = 379,755,338.52/22,371.31
6. Step 6: Final answer
   x = 16,975.11