Finding the Fourth Proportional to 2,288.15, 3,430.86 and 727.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.15 : 3,430.86 = 727.48 : x
2. Step 2: Convert to fraction form
   2,288.15/3,430.86 = 727.48/x
3. Step 3: Cross multiply
   2,288.15x = 3,430.86 × 727.48
4. Step 4: Simplify right side
   2,288.15x = 2,495,883.59
5. Step 5: Solve for x
   x = 2,495,883.59/2,288.15
6. Step 6: Final answer
   x = 1,090.79