Finding the Fourth Proportional to 12,517.80, 18,778.72 and 5,940.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,517.80 : 18,778.72 = 5,940.39 : x
2. Step 2: Convert to fraction form
   12,517.80/18,778.72 = 5,940.39/x
3. Step 3: Cross multiply
   12,517.80x = 18,778.72 × 5,940.39
4. Step 4: Simplify right side
   12,517.80x = 111,552,920.50
5. Step 5: Solve for x
   x = 111,552,920.50/12,517.80
6. Step 6: Final answer
   x = 8,911.54