Finding the Fourth Proportional to 11,707.86, 17,535.42 and 8,213.43

Step by Step Solution

1. Step 1: Write the proportion equation
   11,707.86 : 17,535.42 = 8,213.43 : x
2. Step 2: Convert to fraction form
   11,707.86/17,535.42 = 8,213.43/x
3. Step 3: Cross multiply
   11,707.86x = 17,535.42 × 8,213.43
4. Step 4: Simplify right side
   11,707.86x = 144,025,944.69
5. Step 5: Solve for x
   x = 144,025,944.69/11,707.86
6. Step 6: Final answer
   x = 12,301.65