Finding the Fourth Proportional to 1,139.79, 1,706.04 and 591.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.79 : 1,706.04 = 591.22 : x
2. Step 2: Convert to fraction form
   1,139.79/1,706.04 = 591.22/x
3. Step 3: Cross multiply
   1,139.79x = 1,706.04 × 591.22
4. Step 4: Simplify right side
   1,139.79x = 1,008,647.10
5. Step 5: Solve for x
   x = 1,008,647.10/1,139.79
6. Step 6: Final answer
   x = 884.94