Finding the Fourth Proportional to 312,436.96, 431,162.34 and 169,196.56

Step by Step Solution

1. Step 1: Write the proportion equation
   312,436.96 : 431,162.34 = 169,196.56 : x
2. Step 2: Convert to fraction form
   312,436.96/431,162.34 = 169,196.56/x
3. Step 3: Cross multiply
   312,436.96x = 431,162.34 × 169,196.56
4. Step 4: Simplify right side
   312,436.96x = 72,951,184,729.55
5. Step 5: Solve for x
   x = 72,951,184,729.55/312,436.96
6. Step 6: Final answer
   x = 233,490.89