Finding the Fourth Proportional to 22,401.22, 30,908.72 and 12,964.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,401.22 : 30,908.72 = 12,964.32 : x
2. Step 2: Convert to fraction form
   22,401.22/30,908.72 = 12,964.32/x
3. Step 3: Cross multiply
   22,401.22x = 30,908.72 × 12,964.32
4. Step 4: Simplify right side
   22,401.22x = 400,710,414.74
5. Step 5: Solve for x
   x = 400,710,414.74/22,401.22
6. Step 6: Final answer
   x = 17,887.88