Finding the Fourth Proportional to 2,870.96, 4,306.32 and 923.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.96 : 4,306.32 = 923.12 : x
2. Step 2: Convert to fraction form
   2,870.96/4,306.32 = 923.12/x
3. Step 3: Cross multiply
   2,870.96x = 4,306.32 × 923.12
4. Step 4: Simplify right side
   2,870.96x = 3,975,250.12
5. Step 5: Solve for x
   x = 3,975,250.12/2,870.96
6. Step 6: Final answer
   x = 1,384.64