Finding the Fourth Proportional to 1,248.67, 1,870.17 and 632.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248.67 : 1,870.17 = 632.80 : x
2. Step 2: Convert to fraction form
   1,248.67/1,870.17 = 632.80/x
3. Step 3: Cross multiply
   1,248.67x = 1,870.17 × 632.80
4. Step 4: Simplify right side
   1,248.67x = 1,183,443.58
5. Step 5: Solve for x
   x = 1,183,443.58/1,248.67
6. Step 6: Final answer
   x = 947.76