Finding the Fourth Proportional to 1,686.39, 2,527.59 and 760.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.39 : 2,527.59 = 760.86 : x
2. Step 2: Convert to fraction form
   1,686.39/2,527.59 = 760.86/x
3. Step 3: Cross multiply
   1,686.39x = 2,527.59 × 760.86
4. Step 4: Simplify right side
   1,686.39x = 1,923,129.49
5. Step 5: Solve for x
   x = 1,923,129.49/1,686.39
6. Step 6: Final answer
   x = 1,140.39