Finding the Fourth Proportional to 2,187.02, 3,017.56 and 1,290.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.02 : 3,017.56 = 1,290.82 : x
2. Step 2: Convert to fraction form
   2,187.02/3,017.56 = 1,290.82/x
3. Step 3: Cross multiply
   2,187.02x = 3,017.56 × 1,290.82
4. Step 4: Simplify right side
   2,187.02x = 3,895,126.80
5. Step 5: Solve for x
   x = 3,895,126.80/2,187.02
6. Step 6: Final answer
   x = 1,781.02