Finding the Fourth Proportional to 1,066.17, 1,599.57 and 773.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.17 : 1,599.57 = 773.97 : x
2. Step 2: Convert to fraction form
   1,066.17/1,599.57 = 773.97/x
3. Step 3: Cross multiply
   1,066.17x = 1,599.57 × 773.97
4. Step 4: Simplify right side
   1,066.17x = 1,238,013.19
5. Step 5: Solve for x
   x = 1,238,013.19/1,066.17
6. Step 6: Final answer
   x = 1,161.17