Finding the Fourth Proportional to 336,171.89, 504,356.58 and 99,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   336,171.89 : 504,356.58 = 99,520.72 : x
2. Step 2: Convert to fraction form
   336,171.89/504,356.58 = 99,520.72/x
3. Step 3: Cross multiply
   336,171.89x = 504,356.58 × 99,520.72
4. Step 4: Simplify right side
   336,171.89x = 50,193,927,456.55
5. Step 5: Solve for x
   x = 50,193,927,456.55/336,171.89
6. Step 6: Final answer
   x = 149,310.31