Finding the Fourth Proportional to 105,987.48, 146,151.78 and 79,087.32

Step by Step Solution

1. Step 1: Write the proportion equation
   105,987.48 : 146,151.78 = 79,087.32 : x
2. Step 2: Convert to fraction form
   105,987.48/146,151.78 = 79,087.32/x
3. Step 3: Cross multiply
   105,987.48x = 146,151.78 × 79,087.32
4. Step 4: Simplify right side
   105,987.48x = 11,558,752,593.43
5. Step 5: Solve for x
   x = 11,558,752,593.43/105,987.48
6. Step 6: Final answer
   x = 109,057.72