Finding the Fourth Proportional to 3,405.10, 4,700.81 and 2,147.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.10 : 4,700.81 = 2,147.98 : x
2. Step 2: Convert to fraction form
   3,405.10/4,700.81 = 2,147.98/x
3. Step 3: Cross multiply
   3,405.10x = 4,700.81 × 2,147.98
4. Step 4: Simplify right side
   3,405.10x = 10,097,245.86
5. Step 5: Solve for x
   x = 10,097,245.86/3,405.10
6. Step 6: Final answer
   x = 2,965.33