Finding the Fourth Proportional to 22,450.96, 30,980.21 and 13,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,450.96 : 30,980.21 = 13,018.50 : x
2. Step 2: Convert to fraction form
   22,450.96/30,980.21 = 13,018.50/x
3. Step 3: Cross multiply
   22,450.96x = 30,980.21 × 13,018.50
4. Step 4: Simplify right side
   22,450.96x = 403,315,863.89
5. Step 5: Solve for x
   x = 403,315,863.89/22,450.96
6. Step 6: Final answer
   x = 17,964.30