Finding the Fourth Proportional to 16,818.78, 23,209.56 and 9,264.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.78 : 23,209.56 = 9,264.72 : x
2. Step 2: Convert to fraction form
   16,818.78/23,209.56 = 9,264.72/x
3. Step 3: Cross multiply
   16,818.78x = 23,209.56 × 9,264.72
4. Step 4: Simplify right side
   16,818.78x = 215,030,074.72
5. Step 5: Solve for x
   x = 215,030,074.72/16,818.78
6. Step 6: Final answer
   x = 12,785.12