Finding the Fourth Proportional to 1,276.56, 1,910.73 and 659.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.56 : 1,910.73 = 659.42 : x
2. Step 2: Convert to fraction form
   1,276.56/1,910.73 = 659.42/x
3. Step 3: Cross multiply
   1,276.56x = 1,910.73 × 659.42
4. Step 4: Simplify right side
   1,276.56x = 1,259,973.58
5. Step 5: Solve for x
   x = 1,259,973.58/1,276.56
6. Step 6: Final answer
   x = 987.01