Finding the Fourth Proportional to 4,978.69, 6,870.33 and 2,740.13

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.69 : 6,870.33 = 2,740.13 : x
2. Step 2: Convert to fraction form
   4,978.69/6,870.33 = 2,740.13/x
3. Step 3: Cross multiply
   4,978.69x = 6,870.33 × 2,740.13
4. Step 4: Simplify right side
   4,978.69x = 18,825,597.34
5. Step 5: Solve for x
   x = 18,825,597.34/4,978.69
6. Step 6: Final answer
   x = 3,781.24