Finding the Fourth Proportional to 13,325.50, 18,390.81 and 7,736.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,325.50 : 18,390.81 = 7,736.50 : x
2. Step 2: Convert to fraction form
   13,325.50/18,390.81 = 7,736.50/x
3. Step 3: Cross multiply
   13,325.50x = 18,390.81 × 7,736.50
4. Step 4: Simplify right side
   13,325.50x = 142,280,501.57
5. Step 5: Solve for x
   x = 142,280,501.57/13,325.50
6. Step 6: Final answer
   x = 10,677.31