Finding the Fourth Proportional to 4,978.02, 6,870.15 and 2,740.32

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.02 : 6,870.15 = 2,740.32 : x
2. Step 2: Convert to fraction form
   4,978.02/6,870.15 = 2,740.32/x
3. Step 3: Cross multiply
   4,978.02x = 6,870.15 × 2,740.32
4. Step 4: Simplify right side
   4,978.02x = 18,826,409.45
5. Step 5: Solve for x
   x = 18,826,409.45/4,978.02
6. Step 6: Final answer
   x = 3,781.91