Finding the Fourth Proportional to 107,786.30, 161,666.69 and 28,906.07

Step by Step Solution

1. Step 1: Write the proportion equation
   107,786.30 : 161,666.69 = 28,906.07 : x
2. Step 2: Convert to fraction form
   107,786.30/161,666.69 = 28,906.07/x
3. Step 3: Cross multiply
   107,786.30x = 161,666.69 × 28,906.07
4. Step 4: Simplify right side
   107,786.30x = 4,673,147,704.94
5. Step 5: Solve for x
   x = 4,673,147,704.94/107,786.30
6. Step 6: Final answer
   x = 43,355.68