Finding the Fourth Proportional to 1,118.69, 1,543.48 and 699.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.69 : 1,543.48 = 699.47 : x
2. Step 2: Convert to fraction form
   1,118.69/1,543.48 = 699.47/x
3. Step 3: Cross multiply
   1,118.69x = 1,543.48 × 699.47
4. Step 4: Simplify right side
   1,118.69x = 1,079,606.74
5. Step 5: Solve for x
   x = 1,079,606.74/1,118.69
6. Step 6: Final answer
   x = 965.06