Finding the Fourth Proportional to 1,007.96, 1,508.50 and 637.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.96 : 1,508.50 = 637.59 : x
2. Step 2: Convert to fraction form
   1,007.96/1,508.50 = 637.59/x
3. Step 3: Cross multiply
   1,007.96x = 1,508.50 × 637.59
4. Step 4: Simplify right side
   1,007.96x = 961,801.33
5. Step 5: Solve for x
   x = 961,801.33/1,007.96
6. Step 6: Final answer
   x = 954.21