Finding the Fourth Proportional to 2,847.35, 3,929.31 and 2,007.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,847.35 : 3,929.31 = 2,007.18 : x
2. Step 2: Convert to fraction form
   2,847.35/3,929.31 = 2,007.18/x
3. Step 3: Cross multiply
   2,847.35x = 3,929.31 × 2,007.18
4. Step 4: Simplify right side
   2,847.35x = 7,886,832.45
5. Step 5: Solve for x
   x = 7,886,832.45/2,847.35
6. Step 6: Final answer
   x = 2,769.88