Finding the Fourth Proportional to 1,340.91, 1,850.72 and 874.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.91 : 1,850.72 = 874.35 : x
2. Step 2: Convert to fraction form
   1,340.91/1,850.72 = 874.35/x
3. Step 3: Cross multiply
   1,340.91x = 1,850.72 × 874.35
4. Step 4: Simplify right side
   1,340.91x = 1,618,172.66
5. Step 5: Solve for x
   x = 1,618,172.66/1,340.91
6. Step 6: Final answer
   x = 1,206.77