Finding the Fourth Proportional to 2,501.60, 3,451.20 and 1,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,501.60 : 3,451.20 = 1,556.72 : x
2. Step 2: Convert to fraction form
   2,501.60/3,451.20 = 1,556.72/x
3. Step 3: Cross multiply
   2,501.60x = 3,451.20 × 1,556.72
4. Step 4: Simplify right side
   2,501.60x = 5,372,552.06
5. Step 5: Solve for x
   x = 5,372,552.06/2,501.60
6. Step 6: Final answer
   x = 2,147.65