Finding the Fourth Proportional to 2,309.77, 3,187.56 and 1,261.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.77 : 3,187.56 = 1,261.86 : x
2. Step 2: Convert to fraction form
   2,309.77/3,187.56 = 1,261.86/x
3. Step 3: Cross multiply
   2,309.77x = 3,187.56 × 1,261.86
4. Step 4: Simplify right side
   2,309.77x = 4,022,254.46
5. Step 5: Solve for x
   x = 4,022,254.46/2,309.77
6. Step 6: Final answer
   x = 1,741.41