Finding the Fourth Proportional to 5,128.49, 7,690.32 and 3,048.77

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128.49 : 7,690.32 = 3,048.77 : x
2. Step 2: Convert to fraction form
   5,128.49/7,690.32 = 3,048.77/x
3. Step 3: Cross multiply
   5,128.49x = 7,690.32 × 3,048.77
4. Step 4: Simplify right side
   5,128.49x = 23,445,978.45
5. Step 5: Solve for x
   x = 23,445,978.45/5,128.49
6. Step 6: Final answer
   x = 4,571.72