Finding the Fourth Proportional to 2,086.07, 2,878.13 and 1,258.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.07 : 2,878.13 = 1,258.07 : x
2. Step 2: Convert to fraction form
   2,086.07/2,878.13 = 1,258.07/x
3. Step 3: Cross multiply
   2,086.07x = 2,878.13 × 1,258.07
4. Step 4: Simplify right side
   2,086.07x = 3,620,889.01
5. Step 5: Solve for x
   x = 3,620,889.01/2,086.07
6. Step 6: Final answer
   x = 1,735.75