Finding the Fourth Proportional to 118,555.34, 163,609.89 and 64,839.38

Step by Step Solution

1. Step 1: Write the proportion equation
   118,555.34 : 163,609.89 = 64,839.38 : x
2. Step 2: Convert to fraction form
   118,555.34/163,609.89 = 64,839.38/x
3. Step 3: Cross multiply
   118,555.34x = 163,609.89 × 64,839.38
4. Step 4: Simplify right side
   118,555.34x = 10,608,363,829.47
5. Step 5: Solve for x
   x = 10,608,363,829.47/118,555.34
6. Step 6: Final answer
   x = 89,480.27