Finding the Fourth Proportional to 13,150.98, 18,148.38 and 7,182.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.98 : 18,148.38 = 7,182.78 : x
2. Step 2: Convert to fraction form
   13,150.98/18,148.38 = 7,182.78/x
3. Step 3: Cross multiply
   13,150.98x = 18,148.38 × 7,182.78
4. Step 4: Simplify right side
   13,150.98x = 130,355,820.90
5. Step 5: Solve for x
   x = 130,355,820.90/13,150.98
6. Step 6: Final answer
   x = 9,912.25