Finding the Fourth Proportional to 4,978.60, 6,870.63 and 2,740.71

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.60 : 6,870.63 = 2,740.71 : x
2. Step 2: Convert to fraction form
   4,978.60/6,870.63 = 2,740.71/x
3. Step 3: Cross multiply
   4,978.60x = 6,870.63 × 2,740.71
4. Step 4: Simplify right side
   4,978.60x = 18,830,404.35
5. Step 5: Solve for x
   x = 18,830,404.35/4,978.60
6. Step 6: Final answer
   x = 3,782.27