Finding the Fourth Proportional to 311,353.31, 429,503.89 and 196,590.49

Step by Step Solution

1. Step 1: Write the proportion equation
   311,353.31 : 429,503.89 = 196,590.49 : x
2. Step 2: Convert to fraction form
   311,353.31/429,503.89 = 196,590.49/x
3. Step 3: Cross multiply
   311,353.31x = 429,503.89 × 196,590.49
4. Step 4: Simplify right side
   311,353.31x = 84,436,377,061.53
5. Step 5: Solve for x
   x = 84,436,377,061.53/311,353.31
6. Step 6: Final answer
   x = 271,191.52