Finding the Fourth Proportional to 3,499.20, 4,827.96 and 2,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,499.20 : 4,827.96 = 2,790.72 : x
2. Step 2: Convert to fraction form
   3,499.20/4,827.96 = 2,790.72/x
3. Step 3: Cross multiply
   3,499.20x = 4,827.96 × 2,790.72
4. Step 4: Simplify right side
   3,499.20x = 13,473,484.53
5. Step 5: Solve for x
   x = 13,473,484.53/3,499.20
6. Step 6: Final answer
   x = 3,850.45