Finding the Fourth Proportional to 8,069.29, 12,100.89 and 3,138.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,069.29 : 12,100.89 = 3,138.31 : x
2. Step 2: Convert to fraction form
   8,069.29/12,100.89 = 3,138.31/x
3. Step 3: Cross multiply
   8,069.29x = 12,100.89 × 3,138.31
4. Step 4: Simplify right side
   8,069.29x = 37,976,344.10
5. Step 5: Solve for x
   x = 37,976,344.10/8,069.29
6. Step 6: Final answer
   x = 4,706.28