Finding the Fourth Proportional to 22,427.50, 30,949.95 and 12,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,427.50 : 30,949.95 = 12,491.50 : x
2. Step 2: Convert to fraction form
   22,427.50/30,949.95 = 12,491.50/x
3. Step 3: Cross multiply
   22,427.50x = 30,949.95 × 12,491.50
4. Step 4: Simplify right side
   22,427.50x = 386,611,300.43
5. Step 5: Solve for x
   x = 386,611,300.43/22,427.50
6. Step 6: Final answer
   x = 17,238.27