Finding the Fourth Proportional to 1,164.03, 1,606.50 and 666.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.03 : 1,606.50 = 666.69 : x
2. Step 2: Convert to fraction form
   1,164.03/1,606.50 = 666.69/x
3. Step 3: Cross multiply
   1,164.03x = 1,606.50 × 666.69
4. Step 4: Simplify right side
   1,164.03x = 1,071,037.49
5. Step 5: Solve for x
   x = 1,071,037.49/1,164.03
6. Step 6: Final answer
   x = 920.11