Finding the Fourth Proportional to 2,619.92, 3,615.80 and 1,572.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.92 : 3,615.80 = 1,572.56 : x
2. Step 2: Convert to fraction form
   2,619.92/3,615.80 = 1,572.56/x
3. Step 3: Cross multiply
   2,619.92x = 3,615.80 × 1,572.56
4. Step 4: Simplify right side
   2,619.92x = 5,686,062.45
5. Step 5: Solve for x
   x = 5,686,062.45/2,619.92
6. Step 6: Final answer
   x = 2,170.32