Finding the Fourth Proportional to 6,870.68, 10,306.40 and 1,940.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.68 : 10,306.40 = 1,940.72 : x
2. Step 2: Convert to fraction form
   6,870.68/10,306.40 = 1,940.72/x
3. Step 3: Cross multiply
   6,870.68x = 10,306.40 × 1,940.72
4. Step 4: Simplify right side
   6,870.68x = 20,001,836.61
5. Step 5: Solve for x
   x = 20,001,836.61/6,870.68
6. Step 6: Final answer
   x = 2,911.19