Finding the Fourth Proportional to 1,076.89, 1,616.82 and 557.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.89 : 1,616.82 = 557.32 : x
2. Step 2: Convert to fraction form
   1,076.89/1,616.82 = 557.32/x
3. Step 3: Cross multiply
   1,076.89x = 1,616.82 × 557.32
4. Step 4: Simplify right side
   1,076.89x = 901,086.12
5. Step 5: Solve for x
   x = 901,086.12/1,076.89
6. Step 6: Final answer
   x = 836.75