Finding the Fourth Proportional to 1,630.40, 2,443.43 and 762.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,630.40 : 2,443.43 = 762.89 : x
2. Step 2: Convert to fraction form
   1,630.40/2,443.43 = 762.89/x
3. Step 3: Cross multiply
   1,630.40x = 2,443.43 × 762.89
4. Step 4: Simplify right side
   1,630.40x = 1,864,058.00
5. Step 5: Solve for x
   x = 1,864,058.00/1,630.40
6. Step 6: Final answer
   x = 1,143.32