Finding the Fourth Proportional to 2,086.17, 3,129.02 and 699.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.17 : 3,129.02 = 699.47 : x
2. Step 2: Convert to fraction form
   2,086.17/3,129.02 = 699.47/x
3. Step 3: Cross multiply
   2,086.17x = 3,129.02 × 699.47
4. Step 4: Simplify right side
   2,086.17x = 2,188,655.62
5. Step 5: Solve for x
   x = 2,188,655.62/2,086.17
6. Step 6: Final answer
   x = 1,049.13