Finding the Fourth Proportional to 2,613.78, 3,608.72 and 2,015.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.78 : 3,608.72 = 2,015.14 : x
2. Step 2: Convert to fraction form
   2,613.78/3,608.72 = 2,015.14/x
3. Step 3: Cross multiply
   2,613.78x = 3,608.72 × 2,015.14
4. Step 4: Simplify right side
   2,613.78x = 7,272,076.02
5. Step 5: Solve for x
   x = 7,272,076.02/2,613.78
6. Step 6: Final answer
   x = 2,782.21