Finding the Fourth Proportional to 105,016.88, 144,880.44 and 64,159.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,016.88 : 144,880.44 = 64,159.76 : x
2. Step 2: Convert to fraction form
   105,016.88/144,880.44 = 64,159.76/x
3. Step 3: Cross multiply
   105,016.88x = 144,880.44 × 64,159.76
4. Step 4: Simplify right side
   105,016.88x = 9,295,494,259.09
5. Step 5: Solve for x
   x = 9,295,494,259.09/105,016.88
6. Step 6: Final answer
   x = 88,514.29