Finding the Fourth Proportional to 2,598.78, 3,900.60 and 1,864.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,598.78 : 3,900.60 = 1,864.92 : x
2. Step 2: Convert to fraction form
   2,598.78/3,900.60 = 1,864.92/x
3. Step 3: Cross multiply
   2,598.78x = 3,900.60 × 1,864.92
4. Step 4: Simplify right side
   2,598.78x = 7,274,306.95
5. Step 5: Solve for x
   x = 7,274,306.95/2,598.78
6. Step 6: Final answer
   x = 2,799.12