Finding the Fourth Proportional to 2,619.79, 3,615.22 and 1,557.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.79 : 3,615.22 = 1,557.55 : x
2. Step 2: Convert to fraction form
   2,619.79/3,615.22 = 1,557.55/x
3. Step 3: Cross multiply
   2,619.79x = 3,615.22 × 1,557.55
4. Step 4: Simplify right side
   2,619.79x = 5,630,892.38
5. Step 5: Solve for x
   x = 5,630,892.38/2,619.79
6. Step 6: Final answer
   x = 2,149.37