Finding the Fourth Proportional to 2,551.62, 3,822.68 and 1,317.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.62 : 3,822.68 = 1,317.72 : x
2. Step 2: Convert to fraction form
   2,551.62/3,822.68 = 1,317.72/x
3. Step 3: Cross multiply
   2,551.62x = 3,822.68 × 1,317.72
4. Step 4: Simplify right side
   2,551.62x = 5,037,221.89
5. Step 5: Solve for x
   x = 5,037,221.89/2,551.62
6. Step 6: Final answer
   x = 1,974.13