Finding the Fourth Proportional to 12,818.88, 17,772.12 and 12,154.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.88 : 17,772.12 = 12,154.32 : x
2. Step 2: Convert to fraction form
   12,818.88/17,772.12 = 12,154.32/x
3. Step 3: Cross multiply
   12,818.88x = 17,772.12 × 12,154.32
4. Step 4: Simplify right side
   12,818.88x = 216,008,033.56
5. Step 5: Solve for x
   x = 216,008,033.56/12,818.88
6. Step 6: Final answer
   x = 16,850.77