Finding the Fourth Proportional to 79,100.62, 118,665.51 and 64,438

Step by Step Solution

1. Step 1: Write the proportion equation
   79,100.62 : 118,665.51 = 64,438 : x
2. Step 2: Convert to fraction form
   79,100.62/118,665.51 = 64,438/x
3. Step 3: Cross multiply
   79,100.62x = 118,665.51 × 64,438
4. Step 4: Simplify right side
   79,100.62x = 7,646,568,133.38
5. Step 5: Solve for x
   x = 7,646,568,133.38/79,100.62
6. Step 6: Final answer
   x = 96,668.88