Finding the Fourth Proportional to 2,686.83, 3,707.81 and 1,507.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.83 : 3,707.81 = 1,507.90 : x
2. Step 2: Convert to fraction form
   2,686.83/3,707.81 = 1,507.90/x
3. Step 3: Cross multiply
   2,686.83x = 3,707.81 × 1,507.90
4. Step 4: Simplify right side
   2,686.83x = 5,591,006.70
5. Step 5: Solve for x
   x = 5,591,006.70/2,686.83
6. Step 6: Final answer
   x = 2,080.89