Finding the Fourth Proportional to 2,559.17, 3,847.31 and 2,100.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.17 : 3,847.31 = 2,100.35 : x
2. Step 2: Convert to fraction form
   2,559.17/3,847.31 = 2,100.35/x
3. Step 3: Cross multiply
   2,559.17x = 3,847.31 × 2,100.35
4. Step 4: Simplify right side
   2,559.17x = 8,080,697.56
5. Step 5: Solve for x
   x = 8,080,697.56/2,559.17
6. Step 6: Final answer
   x = 3,157.55