Finding the Fourth Proportional to 1,987.80, 2,983.52 and 1,868.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.80 : 2,983.52 = 1,868.73 : x
2. Step 2: Convert to fraction form
   1,987.80/2,983.52 = 1,868.73/x
3. Step 3: Cross multiply
   1,987.80x = 2,983.52 × 1,868.73
4. Step 4: Simplify right side
   1,987.80x = 5,575,393.33
5. Step 5: Solve for x
   x = 5,575,393.33/1,987.80
6. Step 6: Final answer
   x = 2,804.81