Finding the Fourth Proportional to 2,108.06, 3,162.38 and 721.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.06 : 3,162.38 = 721.00 : x
2. Step 2: Convert to fraction form
   2,108.06/3,162.38 = 721.00/x
3. Step 3: Cross multiply
   2,108.06x = 3,162.38 × 721.00
4. Step 4: Simplify right side
   2,108.06x = 2,280,076.33
5. Step 5: Solve for x
   x = 2,280,076.33/2,108.06
6. Step 6: Final answer
   x = 1,081.60