Finding the Fourth Proportional to 8,111.92, 12,173.40 and 2,918.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.92 : 12,173.40 = 2,918.32 : x
2. Step 2: Convert to fraction form
   8,111.92/12,173.40 = 2,918.32/x
3. Step 3: Cross multiply
   8,111.92x = 12,173.40 × 2,918.32
4. Step 4: Simplify right side
   8,111.92x = 35,525,876.69
5. Step 5: Solve for x
   x = 35,525,876.69/8,111.92
6. Step 6: Final answer
   x = 4,379.47