Finding the Fourth Proportional to 1,003.76, 1,506.56 and 634.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.76 : 1,506.56 = 634.72 : x
2. Step 2: Convert to fraction form
   1,003.76/1,506.56 = 634.72/x
3. Step 3: Cross multiply
   1,003.76x = 1,506.56 × 634.72
4. Step 4: Simplify right side
   1,003.76x = 956,243.76
5. Step 5: Solve for x
   x = 956,243.76/1,003.76
6. Step 6: Final answer
   x = 952.66