Finding the Fourth Proportional to 2,604.78, 3,909.60 and 1,870.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.78 : 3,909.60 = 1,870.92 : x
2. Step 2: Convert to fraction form
   2,604.78/3,909.60 = 1,870.92/x
3. Step 3: Cross multiply
   2,604.78x = 3,909.60 × 1,870.92
4. Step 4: Simplify right side
   2,604.78x = 7,314,548.83
5. Step 5: Solve for x
   x = 7,314,548.83/2,604.78
6. Step 6: Final answer
   x = 2,808.13