Finding the Fourth Proportional to 1,911.92, 2,637.56 and 1,248.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.92 : 2,637.56 = 1,248.53 : x
2. Step 2: Convert to fraction form
   1,911.92/2,637.56 = 1,248.53/x
3. Step 3: Cross multiply
   1,911.92x = 2,637.56 × 1,248.53
4. Step 4: Simplify right side
   1,911.92x = 3,293,062.72
5. Step 5: Solve for x
   x = 3,293,062.72/1,911.92
6. Step 6: Final answer
   x = 1,722.39