Finding the Fourth Proportional to 1,258.07, 1,736.12 and 698.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.07 : 1,736.12 = 698.52 : x
2. Step 2: Convert to fraction form
   1,258.07/1,736.12 = 698.52/x
3. Step 3: Cross multiply
   1,258.07x = 1,736.12 × 698.52
4. Step 4: Simplify right side
   1,258.07x = 1,212,713.03
5. Step 5: Solve for x
   x = 1,212,713.03/1,258.07
6. Step 6: Final answer
   x = 963.95