Finding the Fourth Proportional to 22,384, 30,890.10 and 12,312.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,384 : 30,890.10 = 12,312.16 : x
2. Step 2: Convert to fraction form
   22,384/30,890.10 = 12,312.16/x
3. Step 3: Cross multiply
   22,384x = 30,890.10 × 12,312.16
4. Step 4: Simplify right side
   22,384x = 380,323,853.62
5. Step 5: Solve for x
   x = 380,323,853.62/22,384
6. Step 6: Final answer
   x = 16,990.88