Finding the Fourth Proportional to 393,180.78, 589,770.17 and 108,870.38

Step by Step Solution

1. Step 1: Write the proportion equation
   393,180.78 : 589,770.17 = 108,870.38 : x
2. Step 2: Convert to fraction form
   393,180.78/589,770.17 = 108,870.38/x
3. Step 3: Cross multiply
   393,180.78x = 589,770.17 × 108,870.38
4. Step 4: Simplify right side
   393,180.78x = 64,208,499,571.71
5. Step 5: Solve for x
   x = 64,208,499,571.71/393,180.78
6. Step 6: Final answer
   x = 163,305.29