Finding the Fourth Proportional to 1,095.01, 1,640.86 and 728.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.01 : 1,640.86 = 728.48 : x
2. Step 2: Convert to fraction form
   1,095.01/1,640.86 = 728.48/x
3. Step 3: Cross multiply
   1,095.01x = 1,640.86 × 728.48
4. Step 4: Simplify right side
   1,095.01x = 1,195,333.69
5. Step 5: Solve for x
   x = 1,195,333.69/1,095.01
6. Step 6: Final answer
   x = 1,091.62