Finding the Fourth Proportional to 2,076.88, 2,865.98 and 1,290.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.88 : 2,865.98 = 1,290.92 : x
2. Step 2: Convert to fraction form
   2,076.88/2,865.98 = 1,290.92/x
3. Step 3: Cross multiply
   2,076.88x = 2,865.98 × 1,290.92
4. Step 4: Simplify right side
   2,076.88x = 3,699,750.90
5. Step 5: Solve for x
   x = 3,699,750.90/2,076.88
6. Step 6: Final answer
   x = 1,781.40