Finding the Fourth Proportional to 3,417.20, 5,118.50 and 2,114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,417.20 : 5,118.50 = 2,114.72 : x
2. Step 2: Convert to fraction form
   3,417.20/5,118.50 = 2,114.72/x
3. Step 3: Cross multiply
   3,417.20x = 5,118.50 × 2,114.72
4. Step 4: Simplify right side
   3,417.20x = 10,824,194.32
5. Step 5: Solve for x
   x = 10,824,194.32/3,417.20
6. Step 6: Final answer
   x = 3,167.56