Finding the Fourth Proportional to 294,009.78, 405,721.53 and 173,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   294,009.78 : 405,721.53 = 173,156.10 : x
2. Step 2: Convert to fraction form
   294,009.78/405,721.53 = 173,156.10/x
3. Step 3: Cross multiply
   294,009.78x = 405,721.53 × 173,156.10
4. Step 4: Simplify right side
   294,009.78x = 70,253,157,820.83
5. Step 5: Solve for x
   x = 70,253,157,820.83/294,009.78
6. Step 6: Final answer
   x = 238,948.37