Finding the Fourth Proportional to 2,155.82, 2,974.22 and 1,315.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.82 : 2,974.22 = 1,315.94 : x
2. Step 2: Convert to fraction form
   2,155.82/2,974.22 = 1,315.94/x
3. Step 3: Cross multiply
   2,155.82x = 2,974.22 × 1,315.94
4. Step 4: Simplify right side
   2,155.82x = 3,913,895.07
5. Step 5: Solve for x
   x = 3,913,895.07/2,155.82
6. Step 6: Final answer
   x = 1,815.50