Finding the Fourth Proportional to 123,929.20, 171,021.94 and 67,340.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,929.20 : 171,021.94 = 67,340.56 : x
2. Step 2: Convert to fraction form
   123,929.20/171,021.94 = 67,340.56/x
3. Step 3: Cross multiply
   123,929.20x = 171,021.94 × 67,340.56
4. Step 4: Simplify right side
   123,929.20x = 11,516,713,211.89
5. Step 5: Solve for x
   x = 11,516,713,211.89/123,929.20
6. Step 6: Final answer
   x = 92,929.78