Finding the Fourth Proportional to 1,164.34, 1,606.78 and 667.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.34 : 1,606.78 = 667.06 : x
2. Step 2: Convert to fraction form
   1,164.34/1,606.78 = 667.06/x
3. Step 3: Cross multiply
   1,164.34x = 1,606.78 × 667.06
4. Step 4: Simplify right side
   1,164.34x = 1,071,818.67
5. Step 5: Solve for x
   x = 1,071,818.67/1,164.34
6. Step 6: Final answer
   x = 920.54