Finding the Fourth Proportional to 2,620.24, 3,615.12 and 1,557.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.24 : 3,615.12 = 1,557.52 : x
2. Step 2: Convert to fraction form
   2,620.24/3,615.12 = 1,557.52/x
3. Step 3: Cross multiply
   2,620.24x = 3,615.12 × 1,557.52
4. Step 4: Simplify right side
   2,620.24x = 5,630,621.70
5. Step 5: Solve for x
   x = 5,630,621.70/2,620.24
6. Step 6: Final answer
   x = 2,148.90