Finding the Fourth Proportional to 3,630.92, 5,013.50 and 2,790.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,630.92 : 5,013.50 = 2,790.30 : x
2. Step 2: Convert to fraction form
   3,630.92/5,013.50 = 2,790.30/x
3. Step 3: Cross multiply
   3,630.92x = 5,013.50 × 2,790.30
4. Step 4: Simplify right side
   3,630.92x = 13,989,155.10
5. Step 5: Solve for x
   x = 13,989,155.10/3,630.92
6. Step 6: Final answer
   x = 3,852.78