Finding the Fourth Proportional to 118,324.05, 163,287.78 and 64,609.06

Step by Step Solution

1. Step 1: Write the proportion equation
   118,324.05 : 163,287.78 = 64,609.06 : x
2. Step 2: Convert to fraction form
   118,324.05/163,287.78 = 64,609.06/x
3. Step 3: Cross multiply
   118,324.05x = 163,287.78 × 64,609.06
4. Step 4: Simplify right side
   118,324.05x = 10,549,870,767.49
5. Step 5: Solve for x
   x = 10,549,870,767.49/118,324.05
6. Step 6: Final answer
   x = 89,160.83