Finding the Fourth Proportional to 13,309.77, 18,367.50 and 7,645.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,309.77 : 18,367.50 = 7,645.61 : x
2. Step 2: Convert to fraction form
   13,309.77/18,367.50 = 7,645.61/x
3. Step 3: Cross multiply
   13,309.77x = 18,367.50 × 7,645.61
4. Step 4: Simplify right side
   13,309.77x = 140,430,751.75
5. Step 5: Solve for x
   x = 140,430,751.75/13,309.77
6. Step 6: Final answer
   x = 10,550.95