Finding the Fourth Proportional to 8,139.12, 12,210.48 and 3,395.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139.12 : 12,210.48 = 3,395.34 : x
2. Step 2: Convert to fraction form
   8,139.12/12,210.48 = 3,395.34/x
3. Step 3: Cross multiply
   8,139.12x = 12,210.48 × 3,395.34
4. Step 4: Simplify right side
   8,139.12x = 41,458,731.16
5. Step 5: Solve for x
   x = 41,458,731.16/8,139.12
6. Step 6: Final answer
   x = 5,093.76