Finding the Fourth Proportional to 16,448.16, 24,635.34 and 12,739.17

Step by Step Solution

1. Step 1: Write the proportion equation
   16,448.16 : 24,635.34 = 12,739.17 : x
2. Step 2: Convert to fraction form
   16,448.16/24,635.34 = 12,739.17/x
3. Step 3: Cross multiply
   16,448.16x = 24,635.34 × 12,739.17
4. Step 4: Simplify right side
   16,448.16x = 313,833,784.27
5. Step 5: Solve for x
   x = 313,833,784.27/16,448.16
6. Step 6: Final answer
   x = 19,080.18