Finding the Fourth Proportional to 2,311.83, 3,190.55 and 1,264.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.83 : 3,190.55 = 1,264.05 : x
2. Step 2: Convert to fraction form
   2,311.83/3,190.55 = 1,264.05/x
3. Step 3: Cross multiply
   2,311.83x = 3,190.55 × 1,264.05
4. Step 4: Simplify right side
   2,311.83x = 4,033,008.41
5. Step 5: Solve for x
   x = 4,033,008.41/2,311.83
6. Step 6: Final answer
   x = 1,744.51