Finding the Fourth Proportional to 2,312.77, 3,191.61 and 1,264.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.77 : 3,191.61 = 1,264.83 : x
2. Step 2: Convert to fraction form
   2,312.77/3,191.61 = 1,264.83/x
3. Step 3: Cross multiply
   2,312.77x = 3,191.61 × 1,264.83
4. Step 4: Simplify right side
   2,312.77x = 4,036,844.08
5. Step 5: Solve for x
   x = 4,036,844.08/2,312.77
6. Step 6: Final answer
   x = 1,745.46