Finding the Fourth Proportional to 2,086.68, 3,128.40 and 1,046.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.68 : 3,128.40 = 1,046.64 : x
2. Step 2: Convert to fraction form
   2,086.68/3,128.40 = 1,046.64/x
3. Step 3: Cross multiply
   2,086.68x = 3,128.40 × 1,046.64
4. Step 4: Simplify right side
   2,086.68x = 3,274,308.58
5. Step 5: Solve for x
   x = 3,274,308.58/2,086.68
6. Step 6: Final answer
   x = 1,569.15