Finding the Fourth Proportional to 13,315.50, 18,374.77 and 7,646.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.50 : 18,374.77 = 7,646.25 : x
2. Step 2: Convert to fraction form
   13,315.50/18,374.77 = 7,646.25/x
3. Step 3: Cross multiply
   13,315.50x = 18,374.77 × 7,646.25
4. Step 4: Simplify right side
   13,315.50x = 140,498,149.61
5. Step 5: Solve for x
   x = 140,498,149.61/13,315.50
6. Step 6: Final answer
   x = 10,551.48