Finding the Fourth Proportional to 2,870.50, 4,306.20 and 922.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.50 : 4,306.20 = 922.42 : x
2. Step 2: Convert to fraction form
   2,870.50/4,306.20 = 922.42/x
3. Step 3: Cross multiply
   2,870.50x = 4,306.20 × 922.42
4. Step 4: Simplify right side
   2,870.50x = 3,972,125.00
5. Step 5: Solve for x
   x = 3,972,125.00/2,870.50
6. Step 6: Final answer
   x = 1,383.77