Finding the Fourth Proportional to 13,255.55, 18,291.98 and 7,287.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,255.55 : 18,291.98 = 7,287.39 : x
2. Step 2: Convert to fraction form
   13,255.55/18,291.98 = 7,287.39/x
3. Step 3: Cross multiply
   13,255.55x = 18,291.98 × 7,287.39
4. Step 4: Simplify right side
   13,255.55x = 133,300,755.70
5. Step 5: Solve for x
   x = 133,300,755.70/13,255.55
6. Step 6: Final answer
   x = 10,056.23