Finding the Fourth Proportional to 12,645.12, 17,449.56 and 7,056.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,645.12 : 17,449.56 = 7,056.48 : x
2. Step 2: Convert to fraction form
   12,645.12/17,449.56 = 7,056.48/x
3. Step 3: Cross multiply
   12,645.12x = 17,449.56 × 7,056.48
4. Step 4: Simplify right side
   12,645.12x = 123,132,471.15
5. Step 5: Solve for x
   x = 123,132,471.15/12,645.12
6. Step 6: Final answer
   x = 9,737.55