Finding the Fourth Proportional to 1,166.01, 1,608.99 and 661.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.01 : 1,608.99 = 661.89 : x
2. Step 2: Convert to fraction form
   1,166.01/1,608.99 = 661.89/x
3. Step 3: Cross multiply
   1,166.01x = 1,608.99 × 661.89
4. Step 4: Simplify right side
   1,166.01x = 1,064,974.39
5. Step 5: Solve for x
   x = 1,064,974.39/1,166.01
6. Step 6: Final answer
   x = 913.35