Finding the Fourth Proportional to 118,694.72, 163,802.40 and 64,984.74

Step by Step Solution

1. Step 1: Write the proportion equation
   118,694.72 : 163,802.40 = 64,984.74 : x
2. Step 2: Convert to fraction form
   118,694.72/163,802.40 = 64,984.74/x
3. Step 3: Cross multiply
   118,694.72x = 163,802.40 × 64,984.74
4. Step 4: Simplify right side
   118,694.72x = 10,644,656,375.38
5. Step 5: Solve for x
   x = 10,644,656,375.38/118,694.72
6. Step 6: Final answer
   x = 89,680.96