Finding the Fourth Proportional to 1,947.51, 2,687.60 and 1,108.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.51 : 2,687.60 = 1,108.12 : x
2. Step 2: Convert to fraction form
   1,947.51/2,687.60 = 1,108.12/x
3. Step 3: Cross multiply
   1,947.51x = 2,687.60 × 1,108.12
4. Step 4: Simplify right side
   1,947.51x = 2,978,183.31
5. Step 5: Solve for x
   x = 2,978,183.31/1,947.51
6. Step 6: Final answer
   x = 1,529.23