Finding the Fourth Proportional to 9,648.12, 13,312.98 and 5,456.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,648.12 : 13,312.98 = 5,456.28 : x
2. Step 2: Convert to fraction form
   9,648.12/13,312.98 = 5,456.28/x
3. Step 3: Cross multiply
   9,648.12x = 13,312.98 × 5,456.28
4. Step 4: Simplify right side
   9,648.12x = 72,639,346.51
5. Step 5: Solve for x
   x = 72,639,346.51/9,648.12
6. Step 6: Final answer
   x = 7,528.86