Finding the Fourth Proportional to 22,116.45, 30,521.28 and 12,045.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,116.45 : 30,521.28 = 12,045.30 : x
2. Step 2: Convert to fraction form
   22,116.45/30,521.28 = 12,045.30/x
3. Step 3: Cross multiply
   22,116.45x = 30,521.28 × 12,045.30
4. Step 4: Simplify right side
   22,116.45x = 367,637,973.98
5. Step 5: Solve for x
   x = 367,637,973.98/22,116.45
6. Step 6: Final answer
   x = 16,622.83