Finding the Fourth Proportional to 150,178.72, 206,906.76 and 123,278.62

Step by Step Solution

1. Step 1: Write the proportion equation
   150,178.72 : 206,906.76 = 123,278.62 : x
2. Step 2: Convert to fraction form
   150,178.72/206,906.76 = 123,278.62/x
3. Step 3: Cross multiply
   150,178.72x = 206,906.76 × 123,278.62
4. Step 4: Simplify right side
   150,178.72x = 25,507,179,841.47
5. Step 5: Solve for x
   x = 25,507,179,841.47/150,178.72
6. Step 6: Final answer
   x = 169,845.50