Finding the Fourth Proportional to 328,870.79, 491,880.89 and 193,612.54

Step by Step Solution

1. Step 1: Write the proportion equation
   328,870.79 : 491,880.89 = 193,612.54 : x
2. Step 2: Convert to fraction form
   328,870.79/491,880.89 = 193,612.54/x
3. Step 3: Cross multiply
   328,870.79x = 491,880.89 × 193,612.54
4. Step 4: Simplify right side
   328,870.79x = 95,234,307,744.69
5. Step 5: Solve for x
   x = 95,234,307,744.69/328,870.79
6. Step 6: Final answer
   x = 289,579.71