Finding the Fourth Proportional to 1,118.04, 1,543.60 and 698.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.04 : 1,543.60 = 698.56 : x
2. Step 2: Convert to fraction form
   1,118.04/1,543.60 = 698.56/x
3. Step 3: Cross multiply
   1,118.04x = 1,543.60 × 698.56
4. Step 4: Simplify right side
   1,118.04x = 1,078,297.22
5. Step 5: Solve for x
   x = 1,078,297.22/1,118.04
6. Step 6: Final answer
   x = 964.45