Finding the Fourth Proportional to 1,165.68, 1,608.72 and 693.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.68 : 1,608.72 = 693.96 : x
2. Step 2: Convert to fraction form
   1,165.68/1,608.72 = 693.96/x
3. Step 3: Cross multiply
   1,165.68x = 1,608.72 × 693.96
4. Step 4: Simplify right side
   1,165.68x = 1,116,387.33
5. Step 5: Solve for x
   x = 1,116,387.33/1,165.68
6. Step 6: Final answer
   x = 957.71