Finding the Fourth Proportional to 118,446.60, 163,456.38 and 64,731.62

Step by Step Solution

1. Step 1: Write the proportion equation
   118,446.60 : 163,456.38 = 64,731.62 : x
2. Step 2: Convert to fraction form
   118,446.60/163,456.38 = 64,731.62/x
3. Step 3: Cross multiply
   118,446.60x = 163,456.38 × 64,731.62
4. Step 4: Simplify right side
   118,446.60x = 10,580,796,685.38
5. Step 5: Solve for x
   x = 10,580,796,685.38/118,446.60
6. Step 6: Final answer
   x = 89,329.68