Finding the Fourth Proportional to 2,686.30, 3,707.12 and 1,507.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.30 : 3,707.12 = 1,507.40 : x
2. Step 2: Convert to fraction form
   2,686.30/3,707.12 = 1,507.40/x
3. Step 3: Cross multiply
   2,686.30x = 3,707.12 × 1,507.40
4. Step 4: Simplify right side
   2,686.30x = 5,588,086.62
5. Step 5: Solve for x
   x = 5,588,086.62/2,686.30
6. Step 6: Final answer
   x = 2,080.22