Finding the Fourth Proportional to 3,200.10, 4,790.55 and 2,816.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,200.10 : 4,790.55 = 2,816.10 : x
2. Step 2: Convert to fraction form
   3,200.10/4,790.55 = 2,816.10/x
3. Step 3: Cross multiply
   3,200.10x = 4,790.55 × 2,816.10
4. Step 4: Simplify right side
   3,200.10x = 13,490,667.86
5. Step 5: Solve for x
   x = 13,490,667.86/3,200.10
6. Step 6: Final answer
   x = 4,215.70