Finding the Fourth Proportional to 12,429.92, 18,647.93 and 10,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.92 : 18,647.93 = 10,212.50 : x
2. Step 2: Convert to fraction form
   12,429.92/18,647.93 = 10,212.50/x
3. Step 3: Cross multiply
   12,429.92x = 18,647.93 × 10,212.50
4. Step 4: Simplify right side
   12,429.92x = 190,441,917.42
5. Step 5: Solve for x
   x = 190,441,917.42/12,429.92
6. Step 6: Final answer
   x = 15,321.25