Finding the Fourth Proportional to 1,329.76, 1,997.52 and 1,086.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,329.76 : 1,997.52 = 1,086.88 : x
2. Step 2: Convert to fraction form
   1,329.76/1,997.52 = 1,086.88/x
3. Step 3: Cross multiply
   1,329.76x = 1,997.52 × 1,086.88
4. Step 4: Simplify right side
   1,329.76x = 2,171,064.54
5. Step 5: Solve for x
   x = 2,171,064.54/1,329.76
6. Step 6: Final answer
   x = 1,632.67