Finding the Fourth Proportional to 108,665.79, 149,894.01 and 79,578.69

Step by Step Solution

1. Step 1: Write the proportion equation
   108,665.79 : 149,894.01 = 79,578.69 : x
2. Step 2: Convert to fraction form
   108,665.79/149,894.01 = 79,578.69/x
3. Step 3: Cross multiply
   108,665.79x = 149,894.01 × 79,578.69
4. Step 4: Simplify right side
   108,665.79x = 11,928,368,954.65
5. Step 5: Solve for x
   x = 11,928,368,954.65/108,665.79
6. Step 6: Final answer
   x = 109,771.15