Finding the Fourth Proportional to 309,831, 464,717.32 and 99,470.76

Step by Step Solution

1. Step 1: Write the proportion equation
   309,831 : 464,717.32 = 99,470.76 : x
2. Step 2: Convert to fraction form
   309,831/464,717.32 = 99,470.76/x
3. Step 3: Cross multiply
   309,831x = 464,717.32 × 99,470.76
4. Step 4: Simplify right side
   309,831x = 46,225,785,005.56
5. Step 5: Solve for x
   x = 46,225,785,005.56/309,831
6. Step 6: Final answer
   x = 149,196.77