Finding the Fourth Proportional to 2,500.78, 3,751.30 and 1,040.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.78 : 3,751.30 = 1,040.08 : x
2. Step 2: Convert to fraction form
   2,500.78/3,751.30 = 1,040.08/x
3. Step 3: Cross multiply
   2,500.78x = 3,751.30 × 1,040.08
4. Step 4: Simplify right side
   2,500.78x = 3,901,652.10
5. Step 5: Solve for x
   x = 3,901,652.10/2,500.78
6. Step 6: Final answer
   x = 1,560.17