Finding the Fourth Proportional to 1,086.56, 1,629.84 and 763.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.56 : 1,629.84 = 763.37 : x
2. Step 2: Convert to fraction form
   1,086.56/1,629.84 = 763.37/x
3. Step 3: Cross multiply
   1,086.56x = 1,629.84 × 763.37
4. Step 4: Simplify right side
   1,086.56x = 1,244,171.79
5. Step 5: Solve for x
   x = 1,244,171.79/1,086.56
6. Step 6: Final answer
   x = 1,145.06