Finding the Fourth Proportional to 2,686.60, 3,707.57 and 1,507.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.60 : 3,707.57 = 1,507.76 : x
2. Step 2: Convert to fraction form
   2,686.60/3,707.57 = 1,507.76/x
3. Step 3: Cross multiply
   2,686.60x = 3,707.57 × 1,507.76
4. Step 4: Simplify right side
   2,686.60x = 5,590,099.67
5. Step 5: Solve for x
   x = 5,590,099.67/2,686.60
6. Step 6: Final answer
   x = 2,080.74