Finding the Fourth Proportional to 22,443.40, 30,971.88 and 13,017.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,443.40 : 30,971.88 = 13,017.42 : x
2. Step 2: Convert to fraction form
   22,443.40/30,971.88 = 13,017.42/x
3. Step 3: Cross multiply
   22,443.40x = 30,971.88 × 13,017.42
4. Step 4: Simplify right side
   22,443.40x = 403,173,970.15
5. Step 5: Solve for x
   x = 403,173,970.15/22,443.40
6. Step 6: Final answer
   x = 17,964.03