Finding the Fourth Proportional to 22,407.14, 30,920.06 and 12,976.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,407.14 : 30,920.06 = 12,976.32 : x
2. Step 2: Convert to fraction form
   22,407.14/30,920.06 = 12,976.32/x
3. Step 3: Cross multiply
   22,407.14x = 30,920.06 × 12,976.32
4. Step 4: Simplify right side
   22,407.14x = 401,228,592.98
5. Step 5: Solve for x
   x = 401,228,592.98/22,407.14
6. Step 6: Final answer
   x = 17,906.28