Finding the Fourth Proportional to 105,249.69, 145,056.69 and 79,695

Step by Step Solution

1. Step 1: Write the proportion equation
   105,249.69 : 145,056.69 = 79,695 : x
2. Step 2: Convert to fraction form
   105,249.69/145,056.69 = 79,695/x
3. Step 3: Cross multiply
   105,249.69x = 145,056.69 × 79,695
4. Step 4: Simplify right side
   105,249.69x = 11,560,292,909.55
5. Step 5: Solve for x
   x = 11,560,292,909.55/105,249.69
6. Step 6: Final answer
   x = 109,836.84