Finding the Fourth Proportional to 354,441.72, 531,691.38 and 105,123

Step by Step Solution

1. Step 1: Write the proportion equation
   354,441.72 : 531,691.38 = 105,123 : x
2. Step 2: Convert to fraction form
   354,441.72/531,691.38 = 105,123/x
3. Step 3: Cross multiply
   354,441.72x = 531,691.38 × 105,123
4. Step 4: Simplify right side
   354,441.72x = 55,892,992,939.74
5. Step 5: Solve for x
   x = 55,892,992,939.74/354,441.72
6. Step 6: Final answer
   x = 157,693.04