Finding the Fourth Proportional to 1,061.76, 1,589.76 and 816.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.76 : 1,589.76 = 816.32 : x
2. Step 2: Convert to fraction form
   1,061.76/1,589.76 = 816.32/x
3. Step 3: Cross multiply
   1,061.76x = 1,589.76 × 816.32
4. Step 4: Simplify right side
   1,061.76x = 1,297,752.88
5. Step 5: Solve for x
   x = 1,297,752.88/1,061.76
6. Step 6: Final answer
   x = 1,222.27