Finding the Fourth Proportional to 1,259.87, 1,890.27 and 567.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.87 : 1,890.27 = 567.05 : x
2. Step 2: Convert to fraction form
   1,259.87/1,890.27 = 567.05/x
3. Step 3: Cross multiply
   1,259.87x = 1,890.27 × 567.05
4. Step 4: Simplify right side
   1,259.87x = 1,071,868.15
5. Step 5: Solve for x
   x = 1,071,868.15/1,259.87
6. Step 6: Final answer
   x = 850.78