Finding the Fourth Proportional to 1,003.60, 1,502.56 and 637.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.60 : 1,502.56 = 637.48 : x
2. Step 2: Convert to fraction form
   1,003.60/1,502.56 = 637.48/x
3. Step 3: Cross multiply
   1,003.60x = 1,502.56 × 637.48
4. Step 4: Simplify right side
   1,003.60x = 957,851.95
5. Step 5: Solve for x
   x = 957,851.95/1,003.60
6. Step 6: Final answer
   x = 954.42