Finding the Fourth Proportional to 13,605.48, 18,778.56 and 8,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,605.48 : 18,778.56 = 8,019.72 : x
2. Step 2: Convert to fraction form
   13,605.48/18,778.56 = 8,019.72/x
3. Step 3: Cross multiply
   13,605.48x = 18,778.56 × 8,019.72
4. Step 4: Simplify right side
   13,605.48x = 150,598,793.20
5. Step 5: Solve for x
   x = 150,598,793.20/13,605.48
6. Step 6: Final answer
   x = 11,068.98