Finding the Fourth Proportional to 105,166.50, 144,979.05 and 64,853.21

Step by Step Solution

1. Step 1: Write the proportion equation
   105,166.50 : 144,979.05 = 64,853.21 : x
2. Step 2: Convert to fraction form
   105,166.50/144,979.05 = 64,853.21/x
3. Step 3: Cross multiply
   105,166.50x = 144,979.05 × 64,853.21
4. Step 4: Simplify right side
   105,166.50x = 9,402,356,050.36
5. Step 5: Solve for x
   x = 9,402,356,050.36/105,166.50
6. Step 6: Final answer
   x = 89,404.48