Finding the Fourth Proportional to 2,503.20, 3,455.16 and 1,618.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.20 : 3,455.16 = 1,618.98 : x
2. Step 2: Convert to fraction form
   2,503.20/3,455.16 = 1,618.98/x
3. Step 3: Cross multiply
   2,503.20x = 3,455.16 × 1,618.98
4. Step 4: Simplify right side
   2,503.20x = 5,593,834.94
5. Step 5: Solve for x
   x = 5,593,834.94/2,503.20
6. Step 6: Final answer
   x = 2,234.67