Finding the Fourth Proportional to 2,647.42, 3,971.32 and 699.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.42 : 3,971.32 = 699.58 : x
2. Step 2: Convert to fraction form
   2,647.42/3,971.32 = 699.58/x
3. Step 3: Cross multiply
   2,647.42x = 3,971.32 × 699.58
4. Step 4: Simplify right side
   2,647.42x = 2,778,256.05
5. Step 5: Solve for x
   x = 2,778,256.05/2,647.42
6. Step 6: Final answer
   x = 1,049.42