Finding the Fourth Proportional to 2,317.19, 3,200.53 and 1,686.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,317.19 : 3,200.53 = 1,686.72 : x
2. Step 2: Convert to fraction form
   2,317.19/3,200.53 = 1,686.72/x
3. Step 3: Cross multiply
   2,317.19x = 3,200.53 × 1,686.72
4. Step 4: Simplify right side
   2,317.19x = 5,398,397.96
5. Step 5: Solve for x
   x = 5,398,397.96/2,317.19
6. Step 6: Final answer
   x = 2,329.72