Finding the Fourth Proportional to 1,076.80, 1,612.32 and 562.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.80 : 1,612.32 = 562.72 : x
2. Step 2: Convert to fraction form
   1,076.80/1,612.32 = 562.72/x
3. Step 3: Cross multiply
   1,076.80x = 1,612.32 × 562.72
4. Step 4: Simplify right side
   1,076.80x = 907,284.71
5. Step 5: Solve for x
   x = 907,284.71/1,076.80
6. Step 6: Final answer
   x = 842.57