Finding the Fourth Proportional to 22,118.94, 30,523.86 and 12,687.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,118.94 : 30,523.86 = 12,687.30 : x
2. Step 2: Convert to fraction form
   22,118.94/30,523.86 = 12,687.30/x
3. Step 3: Cross multiply
   22,118.94x = 30,523.86 × 12,687.30
4. Step 4: Simplify right side
   22,118.94x = 387,265,368.98
5. Step 5: Solve for x
   x = 387,265,368.98/22,118.94
6. Step 6: Final answer
   x = 17,508.31