Finding the Fourth Proportional to 1,165.34, 1,607.96 and 668.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.34 : 1,607.96 = 668.00 : x
2. Step 2: Convert to fraction form
   1,165.34/1,607.96 = 668.00/x
3. Step 3: Cross multiply
   1,165.34x = 1,607.96 × 668.00
4. Step 4: Simplify right side
   1,165.34x = 1,074,105.90
5. Step 5: Solve for x
   x = 1,074,105.90/1,165.34
6. Step 6: Final answer
   x = 921.71