Finding the Fourth Proportional to 1,086.72, 1,627.24 and 903.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.72 : 1,627.24 = 903.56 : x
2. Step 2: Convert to fraction form
   1,086.72/1,627.24 = 903.56/x
3. Step 3: Cross multiply
   1,086.72x = 1,627.24 × 903.56
4. Step 4: Simplify right side
   1,086.72x = 1,470,300.27
5. Step 5: Solve for x
   x = 1,470,300.27/1,086.72
6. Step 6: Final answer
   x = 1,352.98