Finding the Fourth Proportional to 1,141.59, 1,574.94 and 699.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.59 : 1,574.94 = 699.33 : x
2. Step 2: Convert to fraction form
   1,141.59/1,574.94 = 699.33/x
3. Step 3: Cross multiply
   1,141.59x = 1,574.94 × 699.33
4. Step 4: Simplify right side
   1,141.59x = 1,101,411.32
5. Step 5: Solve for x
   x = 1,101,411.32/1,141.59
6. Step 6: Final answer
   x = 964.80