Finding the Fourth Proportional to 13,290.86, 18,341.57 and 7,626.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,290.86 : 18,341.57 = 7,626.06 : x
2. Step 2: Convert to fraction form
   13,290.86/18,341.57 = 7,626.06/x
3. Step 3: Cross multiply
   13,290.86x = 18,341.57 × 7,626.06
4. Step 4: Simplify right side
   13,290.86x = 139,873,913.31
5. Step 5: Solve for x
   x = 139,873,913.31/13,290.86
6. Step 6: Final answer
   x = 10,524.07