Finding the Fourth Proportional to 13,155.82, 18,154.96 and 7,187.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.82 : 18,154.96 = 7,187.83 : x
2. Step 2: Convert to fraction form
   13,155.82/18,154.96 = 7,187.83/x
3. Step 3: Cross multiply
   13,155.82x = 18,154.96 × 7,187.83
4. Step 4: Simplify right side
   13,155.82x = 130,494,766.14
5. Step 5: Solve for x
   x = 130,494,766.14/13,155.82
6. Step 6: Final answer
   x = 9,919.17