Finding the Fourth Proportional to 5,077.76, 7,007.98 and 2,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,077.76 : 7,007.98 = 2,840.50 : x
2. Step 2: Convert to fraction form
   5,077.76/7,007.98 = 2,840.50/x
3. Step 3: Cross multiply
   5,077.76x = 7,007.98 × 2,840.50
4. Step 4: Simplify right side
   5,077.76x = 19,906,132.15
5. Step 5: Solve for x
   x = 19,906,132.15/5,077.76
6. Step 6: Final answer
   x = 3,920.26