Finding the Fourth Proportional to 22,885.34, 31,583.52 and 13,328.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,885.34 : 31,583.52 = 13,328.20 : x
2. Step 2: Convert to fraction form
   22,885.34/31,583.52 = 13,328.20/x
3. Step 3: Cross multiply
   22,885.34x = 31,583.52 × 13,328.20
4. Step 4: Simplify right side
   22,885.34x = 420,951,333.09
5. Step 5: Solve for x
   x = 420,951,333.09/22,885.34
6. Step 6: Final answer
   x = 18,393.93