Finding the Fourth Proportional to 6,918.30, 10,377.72 and 1,987.83

Step by Step Solution

1. Step 1: Write the proportion equation
   6,918.30 : 10,377.72 = 1,987.83 : x
2. Step 2: Convert to fraction form
   6,918.30/10,377.72 = 1,987.83/x
3. Step 3: Cross multiply
   6,918.30x = 10,377.72 × 1,987.83
4. Step 4: Simplify right side
   6,918.30x = 20,629,143.15
5. Step 5: Solve for x
   x = 20,629,143.15/6,918.30
6. Step 6: Final answer
   x = 2,981.82