Finding the Fourth Proportional to 1,066.54, 1,601.37 and 657.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.54 : 1,601.37 = 657.39 : x
2. Step 2: Convert to fraction form
   1,066.54/1,601.37 = 657.39/x
3. Step 3: Cross multiply
   1,066.54x = 1,601.37 × 657.39
4. Step 4: Simplify right side
   1,066.54x = 1,052,724.62
5. Step 5: Solve for x
   x = 1,052,724.62/1,066.54
6. Step 6: Final answer
   x = 987.05