Finding the Fourth Proportional to 2,086.79, 3,128.71 and 1,046.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.79 : 3,128.71 = 1,046.05 : x
2. Step 2: Convert to fraction form
   2,086.79/3,128.71 = 1,046.05/x
3. Step 3: Cross multiply
   2,086.79x = 3,128.71 × 1,046.05
4. Step 4: Simplify right side
   2,086.79x = 3,272,787.10
5. Step 5: Solve for x
   x = 3,272,787.10/2,086.79
6. Step 6: Final answer
   x = 1,568.34