Finding the Fourth Proportional to 4,978.58, 6,870.56 and 2,740.47

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.58 : 6,870.56 = 2,740.47 : x
2. Step 2: Convert to fraction form
   4,978.58/6,870.56 = 2,740.47/x
3. Step 3: Cross multiply
   4,978.58x = 6,870.56 × 2,740.47
4. Step 4: Simplify right side
   4,978.58x = 18,828,564.64
5. Step 5: Solve for x
   x = 18,828,564.64/4,978.58
6. Step 6: Final answer
   x = 3,781.92