Finding the Fourth Proportional to 12,448.32, 17,187.36 and 7,734.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.32 : 17,187.36 = 7,734.72 : x
2. Step 2: Convert to fraction form
   12,448.32/17,187.36 = 7,734.72/x
3. Step 3: Cross multiply
   12,448.32x = 17,187.36 × 7,734.72
4. Step 4: Simplify right side
   12,448.32x = 132,939,417.14
5. Step 5: Solve for x
   x = 132,939,417.14/12,448.32
6. Step 6: Final answer
   x = 10,679.31