Finding the Fourth Proportional to 1,863.89, 2,796.20 and 631.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.89 : 2,796.20 = 631.25 : x
2. Step 2: Convert to fraction form
   1,863.89/2,796.20 = 631.25/x
3. Step 3: Cross multiply
   1,863.89x = 2,796.20 × 631.25
4. Step 4: Simplify right side
   1,863.89x = 1,765,098.09
5. Step 5: Solve for x
   x = 1,765,098.09/1,863.89
6. Step 6: Final answer
   x = 947.00