Finding the Fourth Proportional to 6,870.78, 10,298.31 and 2,708.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.78 : 10,298.31 = 2,708.50 : x
2. Step 2: Convert to fraction form
   6,870.78/10,298.31 = 2,708.50/x
3. Step 3: Cross multiply
   6,870.78x = 10,298.31 × 2,708.50
4. Step 4: Simplify right side
   6,870.78x = 27,892,972.64
5. Step 5: Solve for x
   x = 27,892,972.64/6,870.78
6. Step 6: Final answer
   x = 4,059.65