Finding the Fourth Proportional to 22,400.06, 30,911.31 and 12,328.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,400.06 : 30,911.31 = 12,328.43 : x
2. Step 2: Convert to fraction form
   22,400.06/30,911.31 = 12,328.43/x
3. Step 3: Cross multiply
   22,400.06x = 30,911.31 × 12,328.43
4. Step 4: Simplify right side
   22,400.06x = 381,087,766.99
5. Step 5: Solve for x
   x = 381,087,766.99/22,400.06
6. Step 6: Final answer
   x = 17,012.80