Finding the Fourth Proportional to 205,556.32, 308,109.24 and 105,721.78

Step by Step Solution

1. Step 1: Write the proportion equation
   205,556.32 : 308,109.24 = 105,721.78 : x
2. Step 2: Convert to fraction form
   205,556.32/308,109.24 = 105,721.78/x
3. Step 3: Cross multiply
   205,556.32x = 308,109.24 × 105,721.78
4. Step 4: Simplify right side
   205,556.32x = 32,573,857,287.25
5. Step 5: Solve for x
   x = 32,573,857,287.25/205,556.32
6. Step 6: Final answer
   x = 158,466.82