Finding the Fourth Proportional to 4,978.63, 6,870.34 and 2,740.30

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.63 : 6,870.34 = 2,740.30 : x
2. Step 2: Convert to fraction form
   4,978.63/6,870.34 = 2,740.30/x
3. Step 3: Cross multiply
   4,978.63x = 6,870.34 × 2,740.30
4. Step 4: Simplify right side
   4,978.63x = 18,826,792.70
5. Step 5: Solve for x
   x = 18,826,792.70/4,978.63
6. Step 6: Final answer
   x = 3,781.52