Finding the Fourth Proportional to 1,340.91, 1,850.06 and 921.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.91 : 1,850.06 = 921.74 : x
2. Step 2: Convert to fraction form
   1,340.91/1,850.06 = 921.74/x
3. Step 3: Cross multiply
   1,340.91x = 1,850.06 × 921.74
4. Step 4: Simplify right side
   1,340.91x = 1,705,262.17
5. Step 5: Solve for x
   x = 1,705,262.17/1,340.91
6. Step 6: Final answer
   x = 1,271.72