Finding the Fourth Proportional to 8,070.31, 12,105.43 and 3,143.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,070.31 : 12,105.43 = 3,143.39 : x
2. Step 2: Convert to fraction form
   8,070.31/12,105.43 = 3,143.39/x
3. Step 3: Cross multiply
   8,070.31x = 12,105.43 × 3,143.39
4. Step 4: Simplify right side
   8,070.31x = 38,052,019.22
5. Step 5: Solve for x
   x = 38,052,019.22/8,070.31
6. Step 6: Final answer
   x = 4,715.06