Finding the Fourth Proportional to 105,017.09, 144,934.82 and 64,205.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,017.09 : 144,934.82 = 64,205.16 : x
2. Step 2: Convert to fraction form
   105,017.09/144,934.82 = 64,205.16/x
3. Step 3: Cross multiply
   105,017.09x = 144,934.82 × 64,205.16
4. Step 4: Simplify right side
   105,017.09x = 9,305,563,649.35
5. Step 5: Solve for x
   x = 9,305,563,649.35/105,017.09
6. Step 6: Final answer
   x = 88,609.99