Finding the Fourth Proportional to 2,605.48, 3,902.40 and 2,016.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605.48 : 3,902.40 = 2,016.47 : x
2. Step 2: Convert to fraction form
   2,605.48/3,902.40 = 2,016.47/x
3. Step 3: Cross multiply
   2,605.48x = 3,902.40 × 2,016.47
4. Step 4: Simplify right side
   2,605.48x = 7,869,072.53
5. Step 5: Solve for x
   x = 7,869,072.53/2,605.48
6. Step 6: Final answer
   x = 3,020.20