Finding the Fourth Proportional to 118,691.28, 163,793.69 and 64,975.83

Step by Step Solution

1. Step 1: Write the proportion equation
   118,691.28 : 163,793.69 = 64,975.83 : x
2. Step 2: Convert to fraction form
   118,691.28/163,793.69 = 64,975.83/x
3. Step 3: Cross multiply
   118,691.28x = 163,793.69 × 64,975.83
4. Step 4: Simplify right side
   118,691.28x = 10,642,630,626.56
5. Step 5: Solve for x
   x = 10,642,630,626.56/118,691.28
6. Step 6: Final answer
   x = 89,666.49