Finding the Fourth Proportional to 67,665.69, 93,388.56 and 38,979.78

Step by Step Solution

1. Step 1: Write the proportion equation
   67,665.69 : 93,388.56 = 38,979.78 : x
2. Step 2: Convert to fraction form
   67,665.69/93,388.56 = 38,979.78/x
3. Step 3: Cross multiply
   67,665.69x = 93,388.56 × 38,979.78
4. Step 4: Simplify right side
   67,665.69x = 3,640,265,523.32
5. Step 5: Solve for x
   x = 3,640,265,523.32/67,665.69
6. Step 6: Final answer
   x = 53,797.80