Finding the Fourth Proportional to 13,078.50, 18,050.76 and 7,489.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.50 : 18,050.76 = 7,489.50 : x
2. Step 2: Convert to fraction form
   13,078.50/18,050.76 = 7,489.50/x
3. Step 3: Cross multiply
   13,078.50x = 18,050.76 × 7,489.50
4. Step 4: Simplify right side
   13,078.50x = 135,191,167.02
5. Step 5: Solve for x
   x = 135,191,167.02/13,078.50
6. Step 6: Final answer
   x = 10,336.90