Finding the Fourth Proportional to 13,151.55, 18,149.56 and 7,486.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,151.55 : 18,149.56 = 7,486.16 : x
2. Step 2: Convert to fraction form
   13,151.55/18,149.56 = 7,486.16/x
3. Step 3: Cross multiply
   13,151.55x = 18,149.56 × 7,486.16
4. Step 4: Simplify right side
   13,151.55x = 135,870,400.63
5. Step 5: Solve for x
   x = 135,870,400.63/13,151.55
6. Step 6: Final answer
   x = 10,331.13