Finding the Fourth Proportional to 1,914.43, 2,640.79 and 1,205.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.43 : 2,640.79 = 1,205.99 : x
2. Step 2: Convert to fraction form
   1,914.43/2,640.79 = 1,205.99/x
3. Step 3: Cross multiply
   1,914.43x = 2,640.79 × 1,205.99
4. Step 4: Simplify right side
   1,914.43x = 3,184,766.33
5. Step 5: Solve for x
   x = 3,184,766.33/1,914.43
6. Step 6: Final answer
   x = 1,663.56