Finding the Fourth Proportional to 16,819.64, 23,212.17 and 9,265.99

Step by Step Solution

1. Step 1: Write the proportion equation
   16,819.64 : 23,212.17 = 9,265.99 : x
2. Step 2: Convert to fraction form
   16,819.64/23,212.17 = 9,265.99/x
3. Step 3: Cross multiply
   16,819.64x = 23,212.17 × 9,265.99
4. Step 4: Simplify right side
   16,819.64x = 215,083,677.07
5. Step 5: Solve for x
   x = 215,083,677.07/16,819.64
6. Step 6: Final answer
   x = 12,787.65