Finding the Fourth Proportional to 1,643.91, 2,458.37 and 1,227.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.91 : 2,458.37 = 1,227.73 : x
2. Step 2: Convert to fraction form
   1,643.91/2,458.37 = 1,227.73/x
3. Step 3: Cross multiply
   1,643.91x = 2,458.37 × 1,227.73
4. Step 4: Simplify right side
   1,643.91x = 3,018,196.17
5. Step 5: Solve for x
   x = 3,018,196.17/1,643.91
6. Step 6: Final answer
   x = 1,835.99