Finding the Fourth Proportional to 2,686.84, 3,707.78 and 1,507.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,686.84 : 3,707.78 = 1,507.78 : x
2. Step 2: Convert to fraction form
   2,686.84/3,707.78 = 1,507.78/x
3. Step 3: Cross multiply
   2,686.84x = 3,707.78 × 1,507.78
4. Step 4: Simplify right side
   2,686.84x = 5,590,513.62
5. Step 5: Solve for x
   x = 5,590,513.62/2,686.84
6. Step 6: Final answer
   x = 2,080.70