Finding the Fourth Proportional to 6,870.80, 10,305.56 and 2,488.08

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.80 : 10,305.56 = 2,488.08 : x
2. Step 2: Convert to fraction form
   6,870.80/10,305.56 = 2,488.08/x
3. Step 3: Cross multiply
   6,870.80x = 10,305.56 × 2,488.08
4. Step 4: Simplify right side
   6,870.80x = 25,641,057.72
5. Step 5: Solve for x
   x = 25,641,057.72/6,870.80
6. Step 6: Final answer
   x = 3,731.89