Finding the Fourth Proportional to 22,118.52, 30,523.32 and 12,688.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,118.52 : 30,523.32 = 12,688.56 : x
2. Step 2: Convert to fraction form
   22,118.52/30,523.32 = 12,688.56/x
3. Step 3: Cross multiply
   22,118.52x = 30,523.32 × 12,688.56
4. Step 4: Simplify right side
   22,118.52x = 387,296,977.22
5. Step 5: Solve for x
   x = 387,296,977.22/22,118.52
6. Step 6: Final answer
   x = 17,510.08