Finding the Fourth Proportional to 1,003.98, 1,504.89 and 656.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.98 : 1,504.89 = 656.22 : x
2. Step 2: Convert to fraction form
   1,003.98/1,504.89 = 656.22/x
3. Step 3: Cross multiply
   1,003.98x = 1,504.89 × 656.22
4. Step 4: Simplify right side
   1,003.98x = 987,538.92
5. Step 5: Solve for x
   x = 987,538.92/1,003.98
6. Step 6: Final answer
   x = 983.62