Finding the Fourth Proportional to 12,480.80, 18,710.24 and 5,091.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.80 : 18,710.24 = 5,091.48 : x
2. Step 2: Convert to fraction form
   12,480.80/18,710.24 = 5,091.48/x
3. Step 3: Cross multiply
   12,480.80x = 18,710.24 × 5,091.48
4. Step 4: Simplify right side
   12,480.80x = 95,262,787.30
5. Step 5: Solve for x
   x = 95,262,787.30/12,480.80
6. Step 6: Final answer
   x = 7,632.75