Finding the Fourth Proportional to 1,164.56, 1,607.02 and 667.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.56 : 1,607.02 = 667.09 : x
2. Step 2: Convert to fraction form
   1,164.56/1,607.02 = 667.09/x
3. Step 3: Cross multiply
   1,164.56x = 1,607.02 × 667.09
4. Step 4: Simplify right side
   1,164.56x = 1,072,018.94
5. Step 5: Solve for x
   x = 1,072,018.94/1,164.56
6. Step 6: Final answer
   x = 920.54