Finding the Fourth Proportional to 1,947.10, 2,686.31 and 1,248.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.10 : 2,686.31 = 1,248.86 : x
2. Step 2: Convert to fraction form
   1,947.10/2,686.31 = 1,248.86/x
3. Step 3: Cross multiply
   1,947.10x = 2,686.31 × 1,248.86
4. Step 4: Simplify right side
   1,947.10x = 3,354,825.11
5. Step 5: Solve for x
   x = 3,354,825.11/1,947.10
6. Step 6: Final answer
   x = 1,722.99