Finding the Fourth Proportional to 12,288.56, 16,822.54 and 12,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.56 : 16,822.54 = 12,200.72 : x
2. Step 2: Convert to fraction form
   12,288.56/16,822.54 = 12,200.72/x
3. Step 3: Cross multiply
   12,288.56x = 16,822.54 × 12,200.72
4. Step 4: Simplify right side
   12,288.56x = 205,247,100.23
5. Step 5: Solve for x
   x = 205,247,100.23/12,288.56
6. Step 6: Final answer
   x = 16,702.29