Finding the Fourth Proportional to 16,820.42, 23,212.32 and 9,266.99

Step by Step Solution

1. Step 1: Write the proportion equation
   16,820.42 : 23,212.32 = 9,266.99 : x
2. Step 2: Convert to fraction form
   16,820.42/23,212.32 = 9,266.99/x
3. Step 3: Cross multiply
   16,820.42x = 23,212.32 × 9,266.99
4. Step 4: Simplify right side
   16,820.42x = 215,108,337.32
5. Step 5: Solve for x
   x = 215,108,337.32/16,820.42
6. Step 6: Final answer
   x = 12,788.52