Finding the Fourth Proportional to 2,086.09, 3,126.78 and 699.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.09 : 3,126.78 = 699.10 : x
2. Step 2: Convert to fraction form
   2,086.09/3,126.78 = 699.10/x
3. Step 3: Cross multiply
   2,086.09x = 3,126.78 × 699.10
4. Step 4: Simplify right side
   2,086.09x = 2,185,931.90
5. Step 5: Solve for x
   x = 2,185,931.90/2,086.09
6. Step 6: Final answer
   x = 1,047.86