Finding the Fourth Proportional to 22,459.50, 30,996.15 and 13,506.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,459.50 : 30,996.15 = 13,506.78 : x
2. Step 2: Convert to fraction form
   22,459.50/30,996.15 = 13,506.78/x
3. Step 3: Cross multiply
   22,459.50x = 30,996.15 × 13,506.78
4. Step 4: Simplify right side
   22,459.50x = 418,658,178.90
5. Step 5: Solve for x
   x = 418,658,178.90/22,459.50
6. Step 6: Final answer
   x = 18,640.58