Finding the Fourth Proportional to 2,079.82, 3,115.86 and 1,615.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.82 : 3,115.86 = 1,615.96 : x
2. Step 2: Convert to fraction form
   2,079.82/3,115.86 = 1,615.96/x
3. Step 3: Cross multiply
   2,079.82x = 3,115.86 × 1,615.96
4. Step 4: Simplify right side
   2,079.82x = 5,035,105.13
5. Step 5: Solve for x
   x = 5,035,105.13/2,079.82
6. Step 6: Final answer
   x = 2,420.93