Finding the Fourth Proportional to 2,870.48, 4,304.16 and 922.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.48 : 4,304.16 = 922.16 : x
2. Step 2: Convert to fraction form
   2,870.48/4,304.16 = 922.16/x
3. Step 3: Cross multiply
   2,870.48x = 4,304.16 × 922.16
4. Step 4: Simplify right side
   2,870.48x = 3,969,124.19
5. Step 5: Solve for x
   x = 3,969,124.19/2,870.48
6. Step 6: Final answer
   x = 1,382.74