Finding the Fourth Proportional to 4,978.58, 6,870.29 and 2,740.45

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.58 : 6,870.29 = 2,740.45 : x
2. Step 2: Convert to fraction form
   4,978.58/6,870.29 = 2,740.45/x
3. Step 3: Cross multiply
   4,978.58x = 6,870.29 × 2,740.45
4. Step 4: Simplify right side
   4,978.58x = 18,827,686.23
5. Step 5: Solve for x
   x = 18,827,686.23/4,978.58
6. Step 6: Final answer
   x = 3,781.74