Finding the Fourth Proportional to 2,548.96, 3,824.72 and 990.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.96 : 3,824.72 = 990.04 : x
2. Step 2: Convert to fraction form
   2,548.96/3,824.72 = 990.04/x
3. Step 3: Cross multiply
   2,548.96x = 3,824.72 × 990.04
4. Step 4: Simplify right side
   2,548.96x = 3,786,625.79
5. Step 5: Solve for x
   x = 3,786,625.79/2,548.96
6. Step 6: Final answer
   x = 1,485.56