Finding the Fourth Proportional to 16,890.29, 23,310.74 and 9,815.34

Step by Step Solution

1. Step 1: Write the proportion equation
   16,890.29 : 23,310.74 = 9,815.34 : x
2. Step 2: Convert to fraction form
   16,890.29/23,310.74 = 9,815.34/x
3. Step 3: Cross multiply
   16,890.29x = 23,310.74 × 9,815.34
4. Step 4: Simplify right side
   16,890.29x = 228,802,895.49
5. Step 5: Solve for x
   x = 228,802,895.49/16,890.29
6. Step 6: Final answer
   x = 13,546.42