Finding the Fourth Proportional to 11,493.80, 15,863.15 and 7,020.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,493.80 : 15,863.15 = 7,020.12 : x
2. Step 2: Convert to fraction form
   11,493.80/15,863.15 = 7,020.12/x
3. Step 3: Cross multiply
   11,493.80x = 15,863.15 × 7,020.12
4. Step 4: Simplify right side
   11,493.80x = 111,361,216.58
5. Step 5: Solve for x
   x = 111,361,216.58/11,493.80
6. Step 6: Final answer
   x = 9,688.81