Finding the Fourth Proportional to 1,076.96, 1,605.76 and 1,057.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.96 : 1,605.76 = 1,057.52 : x
2. Step 2: Convert to fraction form
   1,076.96/1,605.76 = 1,057.52/x
3. Step 3: Cross multiply
   1,076.96x = 1,605.76 × 1,057.52
4. Step 4: Simplify right side
   1,076.96x = 1,698,123.32
5. Step 5: Solve for x
   x = 1,698,123.32/1,076.96
6. Step 6: Final answer
   x = 1,576.77