Finding the Fourth Proportional to 1,164.43, 1,606.79 and 667.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.43 : 1,606.79 = 667.09 : x
2. Step 2: Convert to fraction form
   1,164.43/1,606.79 = 667.09/x
3. Step 3: Cross multiply
   1,164.43x = 1,606.79 × 667.09
4. Step 4: Simplify right side
   1,164.43x = 1,071,862.17
5. Step 5: Solve for x
   x = 1,071,862.17/1,164.43
6. Step 6: Final answer
   x = 920.51