Finding the Fourth Proportional to 22,438.39, 30,964.98 and 13,012.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,438.39 : 30,964.98 = 13,012.42 : x
2. Step 2: Convert to fraction form
   22,438.39/30,964.98 = 13,012.42/x
3. Step 3: Cross multiply
   22,438.39x = 30,964.98 × 13,012.42
4. Step 4: Simplify right side
   22,438.39x = 402,929,325.05
5. Step 5: Solve for x
   x = 402,929,325.05/22,438.39
6. Step 6: Final answer
   x = 17,957.14