Finding the Fourth Proportional to 1,003.76, 1,504.62 and 657.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.76 : 1,504.62 = 657.32 : x
2. Step 2: Convert to fraction form
   1,003.76/1,504.62 = 657.32/x
3. Step 3: Cross multiply
   1,003.76x = 1,504.62 × 657.32
4. Step 4: Simplify right side
   1,003.76x = 989,016.82
5. Step 5: Solve for x
   x = 989,016.82/1,003.76
6. Step 6: Final answer
   x = 985.31