Finding the Fourth Proportional to 16,890.84, 23,309.51 and 9,337.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,890.84 : 23,309.51 = 9,337.05 : x
2. Step 2: Convert to fraction form
   16,890.84/23,309.51 = 9,337.05/x
3. Step 3: Cross multiply
   16,890.84x = 23,309.51 × 9,337.05
4. Step 4: Simplify right side
   16,890.84x = 217,642,013.66
5. Step 5: Solve for x
   x = 217,642,013.66/16,890.84
6. Step 6: Final answer
   x = 12,885.21