Finding the Fourth Proportional to 308,796.72, 426,042.37 and 172,809.06

Step by Step Solution

1. Step 1: Write the proportion equation
   308,796.72 : 426,042.37 = 172,809.06 : x
2. Step 2: Convert to fraction form
   308,796.72/426,042.37 = 172,809.06/x
3. Step 3: Cross multiply
   308,796.72x = 426,042.37 × 172,809.06
4. Step 4: Simplify right side
   308,796.72x = 73,623,981,479.87
5. Step 5: Solve for x
   x = 73,623,981,479.87/308,796.72
6. Step 6: Final answer
   x = 238,422.16