Finding the Fourth Proportional to 1,087.74, 1,630.82 and 698.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.74 : 1,630.82 = 698.18 : x
2. Step 2: Convert to fraction form
   1,087.74/1,630.82 = 698.18/x
3. Step 3: Cross multiply
   1,087.74x = 1,630.82 × 698.18
4. Step 4: Simplify right side
   1,087.74x = 1,138,602.42
5. Step 5: Solve for x
   x = 1,138,602.42/1,087.74
6. Step 6: Final answer
   x = 1,046.76