Finding the Fourth Proportional to 5,085.64, 7,018.42 and 2,847.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,085.64 : 7,018.42 = 2,847.07 : x
2. Step 2: Convert to fraction form
   5,085.64/7,018.42 = 2,847.07/x
3. Step 3: Cross multiply
   5,085.64x = 7,018.42 × 2,847.07
4. Step 4: Simplify right side
   5,085.64x = 19,981,933.03
5. Step 5: Solve for x
   x = 19,981,933.03/5,085.64
6. Step 6: Final answer
   x = 3,929.09