Finding the Fourth Proportional to 2,769.43, 4,154.55 and 990.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,769.43 : 4,154.55 = 990.35 : x
2. Step 2: Convert to fraction form
   2,769.43/4,154.55 = 990.35/x
3. Step 3: Cross multiply
   2,769.43x = 4,154.55 × 990.35
4. Step 4: Simplify right side
   2,769.43x = 4,114,458.59
5. Step 5: Solve for x
   x = 4,114,458.59/2,769.43
6. Step 6: Final answer
   x = 1,485.67