Finding the Fourth Proportional to 5,003.78, 7,510.25 and 2,540.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,003.78 : 7,510.25 = 2,540.30 : x
2. Step 2: Convert to fraction form
   5,003.78/7,510.25 = 2,540.30/x
3. Step 3: Cross multiply
   5,003.78x = 7,510.25 × 2,540.30
4. Step 4: Simplify right side
   5,003.78x = 19,078,256.87
5. Step 5: Solve for x
   x = 19,078,256.87/5,003.78
6. Step 6: Final answer
   x = 3,812.77