Finding the Fourth Proportional to 109,636.50, 163,979.69 and 64,550.45

Step by Step Solution

1. Step 1: Write the proportion equation
   109,636.50 : 163,979.69 = 64,550.45 : x
2. Step 2: Convert to fraction form
   109,636.50/163,979.69 = 64,550.45/x
3. Step 3: Cross multiply
   109,636.50x = 163,979.69 × 64,550.45
4. Step 4: Simplify right side
   109,636.50x = 10,584,962,867.56
5. Step 5: Solve for x
   x = 10,584,962,867.56/109,636.50
6. Step 6: Final answer
   x = 96,545.98