Finding the Fourth Proportional to 2,615.78, 3,609.78 and 1,436.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.78 : 3,609.78 = 1,436.93 : x
2. Step 2: Convert to fraction form
   2,615.78/3,609.78 = 1,436.93/x
3. Step 3: Cross multiply
   2,615.78x = 3,609.78 × 1,436.93
4. Step 4: Simplify right side
   2,615.78x = 5,187,001.18
5. Step 5: Solve for x
   x = 5,187,001.18/2,615.78
6. Step 6: Final answer
   x = 1,982.97