Finding the Fourth Proportional to 16,818.94, 23,210.72 and 9,265.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,818.94 : 23,210.72 = 9,265.78 : x
2. Step 2: Convert to fraction form
   16,818.94/23,210.72 = 9,265.78/x
3. Step 3: Cross multiply
   16,818.94x = 23,210.72 × 9,265.78
4. Step 4: Simplify right side
   16,818.94x = 215,065,378.83
5. Step 5: Solve for x
   x = 215,065,378.83/16,818.94
6. Step 6: Final answer
   x = 12,787.09