Finding the Fourth Proportional to 1,003.74, 1,384.80 and 630.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.74 : 1,384.80 = 630.59 : x
2. Step 2: Convert to fraction form
   1,003.74/1,384.80 = 630.59/x
3. Step 3: Cross multiply
   1,003.74x = 1,384.80 × 630.59
4. Step 4: Simplify right side
   1,003.74x = 873,231.74
5. Step 5: Solve for x
   x = 873,231.74/1,003.74
6. Step 6: Final answer
   x = 869.98