Finding the Fourth Proportional to 2,769.30, 4,152.42 and 920.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,769.30 : 4,152.42 = 920.16 : x
2. Step 2: Convert to fraction form
   2,769.30/4,152.42 = 920.16/x
3. Step 3: Cross multiply
   2,769.30x = 4,152.42 × 920.16
4. Step 4: Simplify right side
   2,769.30x = 3,820,890.79
5. Step 5: Solve for x
   x = 3,820,890.79/2,769.30
6. Step 6: Final answer
   x = 1,379.73