Finding the Fourth Proportional to 2,870.74, 3,963.97 and 1,810.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.74 : 3,963.97 = 1,810.22 : x
2. Step 2: Convert to fraction form
   2,870.74/3,963.97 = 1,810.22/x
3. Step 3: Cross multiply
   2,870.74x = 3,963.97 × 1,810.22
4. Step 4: Simplify right side
   2,870.74x = 7,175,640.22
5. Step 5: Solve for x
   x = 7,175,640.22/2,870.74
6. Step 6: Final answer
   x = 2,499.58