Finding the Fourth Proportional to 2,077.82, 2,866.88 and 1,291.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.82 : 2,866.88 = 1,291.31 : x
2. Step 2: Convert to fraction form
   2,077.82/2,866.88 = 1,291.31/x
3. Step 3: Cross multiply
   2,077.82x = 2,866.88 × 1,291.31
4. Step 4: Simplify right side
   2,077.82x = 3,702,030.81
5. Step 5: Solve for x
   x = 3,702,030.81/2,077.82
6. Step 6: Final answer
   x = 1,781.69