Finding the Fourth Proportional to 2,551.17, 3,520.61 and 1,556.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.17 : 3,520.61 = 1,556.46 : x
2. Step 2: Convert to fraction form
   2,551.17/3,520.61 = 1,556.46/x
3. Step 3: Cross multiply
   2,551.17x = 3,520.61 × 1,556.46
4. Step 4: Simplify right side
   2,551.17x = 5,479,680.86
5. Step 5: Solve for x
   x = 5,479,680.86/2,551.17
6. Step 6: Final answer
   x = 2,147.91