Finding the Fourth Proportional to 16,890.34, 23,312.43 and 9,820.84

Step by Step Solution

1. Step 1: Write the proportion equation
   16,890.34 : 23,312.43 = 9,820.84 : x
2. Step 2: Convert to fraction form
   16,890.34/23,312.43 = 9,820.84/x
3. Step 3: Cross multiply
   16,890.34x = 23,312.43 × 9,820.84
4. Step 4: Simplify right side
   16,890.34x = 228,947,645.04
5. Step 5: Solve for x
   x = 228,947,645.04/16,890.34
6. Step 6: Final answer
   x = 13,554.95