Finding the Fourth Proportional to 105,321.99, 145,260.69 and 79,566.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,321.99 : 145,260.69 = 79,566.42 : x
2. Step 2: Convert to fraction form
   105,321.99/145,260.69 = 79,566.42/x
3. Step 3: Cross multiply
   105,321.99x = 145,260.69 × 79,566.42
4. Step 4: Simplify right side
   105,321.99x = 11,557,873,070.03
5. Step 5: Solve for x
   x = 11,557,873,070.03/105,321.99
6. Step 6: Final answer
   x = 109,738.46