Finding the Fourth Proportional to 1,164.79, 1,606.92 and 667.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.79 : 1,606.92 = 667.31 : x
2. Step 2: Convert to fraction form
   1,164.79/1,606.92 = 667.31/x
3. Step 3: Cross multiply
   1,164.79x = 1,606.92 × 667.31
4. Step 4: Simplify right side
   1,164.79x = 1,072,313.79
5. Step 5: Solve for x
   x = 1,072,313.79/1,164.79
6. Step 6: Final answer
   x = 920.61