Finding the Fourth Proportional to 21,976.71, 30,327.69 and 12,545.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.71 : 30,327.69 = 12,545.25 : x
2. Step 2: Convert to fraction form
   21,976.71/30,327.69 = 12,545.25/x
3. Step 3: Cross multiply
   21,976.71x = 30,327.69 × 12,545.25
4. Step 4: Simplify right side
   21,976.71x = 380,468,452.97
5. Step 5: Solve for x
   x = 380,468,452.97/21,976.71
6. Step 6: Final answer
   x = 17,312.35