Finding the Fourth Proportional to 1,911.09, 2,636.02 and 1,248.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.09 : 2,636.02 = 1,248.10 : x
2. Step 2: Convert to fraction form
   1,911.09/2,636.02 = 1,248.10/x
3. Step 3: Cross multiply
   1,911.09x = 2,636.02 × 1,248.10
4. Step 4: Simplify right side
   1,911.09x = 3,290,016.56
5. Step 5: Solve for x
   x = 3,290,016.56/1,911.09
6. Step 6: Final answer
   x = 1,721.54