Finding the Fourth Proportional to 3,631.60, 5,014.01 and 2,790.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,631.60 : 5,014.01 = 2,790.78 : x
2. Step 2: Convert to fraction form
   3,631.60/5,014.01 = 2,790.78/x
3. Step 3: Cross multiply
   3,631.60x = 5,014.01 × 2,790.78
4. Step 4: Simplify right side
   3,631.60x = 13,992,998.83
5. Step 5: Solve for x
   x = 13,992,998.83/3,631.60
6. Step 6: Final answer
   x = 3,853.12