Finding the Fourth Proportional to 10,815, 16,201.52 and 7,105.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815 : 16,201.52 = 7,105.98 : x
2. Step 2: Convert to fraction form
   10,815/16,201.52 = 7,105.98/x
3. Step 3: Cross multiply
   10,815x = 16,201.52 × 7,105.98
4. Step 4: Simplify right side
   10,815x = 115,127,677.09
5. Step 5: Solve for x
   x = 115,127,677.09/10,815
6. Step 6: Final answer
   x = 10,645.19