Finding the Fourth Proportional to 1,248.84, 1,870.20 and 631.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248.84 : 1,870.20 = 631.62 : x
2. Step 2: Convert to fraction form
   1,248.84/1,870.20 = 631.62/x
3. Step 3: Cross multiply
   1,248.84x = 1,870.20 × 631.62
4. Step 4: Simplify right side
   1,248.84x = 1,181,255.72
5. Step 5: Solve for x
   x = 1,181,255.72/1,248.84
6. Step 6: Final answer
   x = 945.88