Finding the Fourth Proportional to 12,648.32, 17,459.61 and 11,319.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.32 : 17,459.61 = 11,319.72 : x
2. Step 2: Convert to fraction form
   12,648.32/17,459.61 = 11,319.72/x
3. Step 3: Cross multiply
   12,648.32x = 17,459.61 × 11,319.72
4. Step 4: Simplify right side
   12,648.32x = 197,637,788.59
5. Step 5: Solve for x
   x = 197,637,788.59/12,648.32
6. Step 6: Final answer
   x = 15,625.62