Finding the Fourth Proportional to 1,164.38, 1,606.91 and 667.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.38 : 1,606.91 = 667.17 : x
2. Step 2: Convert to fraction form
   1,164.38/1,606.91 = 667.17/x
3. Step 3: Cross multiply
   1,164.38x = 1,606.91 × 667.17
4. Step 4: Simplify right side
   1,164.38x = 1,072,082.14
5. Step 5: Solve for x
   x = 1,072,082.14/1,164.38
6. Step 6: Final answer
   x = 920.73