Finding the Fourth Proportional to 1,165.28, 1,607.81 and 693.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.28 : 1,607.81 = 693.18 : x
2. Step 2: Convert to fraction form
   1,165.28/1,607.81 = 693.18/x
3. Step 3: Cross multiply
   1,165.28x = 1,607.81 × 693.18
4. Step 4: Simplify right side
   1,165.28x = 1,114,498.27
5. Step 5: Solve for x
   x = 1,114,498.27/1,165.28
6. Step 6: Final answer
   x = 956.43