Finding the Fourth Proportional to 13,290.78, 18,341.37 and 7,625.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,290.78 : 18,341.37 = 7,625.78 : x
2. Step 2: Convert to fraction form
   13,290.78/18,341.37 = 7,625.78/x
3. Step 3: Cross multiply
   13,290.78x = 18,341.37 × 7,625.78
4. Step 4: Simplify right side
   13,290.78x = 139,867,252.52
5. Step 5: Solve for x
   x = 139,867,252.52/13,290.78
6. Step 6: Final answer
   x = 10,523.63