Finding the Fourth Proportional to 1,643.82, 2,463.82 and 911.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.82 : 2,463.82 = 911.94 : x
2. Step 2: Convert to fraction form
   1,643.82/2,463.82 = 911.94/x
3. Step 3: Cross multiply
   1,643.82x = 2,463.82 × 911.94
4. Step 4: Simplify right side
   1,643.82x = 2,246,856.01
5. Step 5: Solve for x
   x = 2,246,856.01/1,643.82
6. Step 6: Final answer
   x = 1,366.85