Finding the Fourth Proportional to 13,147.92, 19,700.01 and 10,815.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.92 : 19,700.01 = 10,815.12 : x
2. Step 2: Convert to fraction form
   13,147.92/19,700.01 = 10,815.12/x
3. Step 3: Cross multiply
   13,147.92x = 19,700.01 × 10,815.12
4. Step 4: Simplify right side
   13,147.92x = 213,057,972.15
5. Step 5: Solve for x
   x = 213,057,972.15/13,147.92
6. Step 6: Final answer
   x = 16,204.69