Finding the Fourth Proportional to 22,407.76, 30,920.16 and 12,974.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,407.76 : 30,920.16 = 12,974.56 : x
2. Step 2: Convert to fraction form
   22,407.76/30,920.16 = 12,974.56/x
3. Step 3: Cross multiply
   22,407.76x = 30,920.16 × 12,974.56
4. Step 4: Simplify right side
   22,407.76x = 401,175,471.13
5. Step 5: Solve for x
   x = 401,175,471.13/22,407.76
6. Step 6: Final answer
   x = 17,903.42