Finding the Fourth Proportional to 2,911.31, 4,018.98 and 1,863.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,911.31 : 4,018.98 = 1,863.98 : x
2. Step 2: Convert to fraction form
   2,911.31/4,018.98 = 1,863.98/x
3. Step 3: Cross multiply
   2,911.31x = 4,018.98 × 1,863.98
4. Step 4: Simplify right side
   2,911.31x = 7,491,278.25
5. Step 5: Solve for x
   x = 7,491,278.25/2,911.31
6. Step 6: Final answer
   x = 2,573.17