Finding the Fourth Proportional to 2,540.21, 3,503.45 and 1,607.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.21 : 3,503.45 = 1,607.09 : x
2. Step 2: Convert to fraction form
   2,540.21/3,503.45 = 1,607.09/x
3. Step 3: Cross multiply
   2,540.21x = 3,503.45 × 1,607.09
4. Step 4: Simplify right side
   2,540.21x = 5,630,345.96
5. Step 5: Solve for x
   x = 5,630,345.96/2,540.21
6. Step 6: Final answer
   x = 2,216.49