Finding the Fourth Proportional to 5,128.16, 7,076.86 and 2,770.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128.16 : 7,076.86 = 2,770.30 : x
2. Step 2: Convert to fraction form
   5,128.16/7,076.86 = 2,770.30/x
3. Step 3: Cross multiply
   5,128.16x = 7,076.86 × 2,770.30
4. Step 4: Simplify right side
   5,128.16x = 19,605,007.57
5. Step 5: Solve for x
   x = 19,605,007.57/5,128.16
6. Step 6: Final answer
   x = 3,823.01