Finding the Fourth Proportional to 22,236, 30,686.52 and 12,677.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,236 : 30,686.52 = 12,677.40 : x
2. Step 2: Convert to fraction form
   22,236/30,686.52 = 12,677.40/x
3. Step 3: Cross multiply
   22,236x = 30,686.52 × 12,677.40
4. Step 4: Simplify right side
   22,236x = 389,025,288.65
5. Step 5: Solve for x
   x = 389,025,288.65/22,236
6. Step 6: Final answer
   x = 17,495.29