Finding the Fourth Proportional to 328,200.86, 492,257.55 and 91,523.72

Step by Step Solution

1. Step 1: Write the proportion equation
   328,200.86 : 492,257.55 = 91,523.72 : x
2. Step 2: Convert to fraction form
   328,200.86/492,257.55 = 91,523.72/x
3. Step 3: Cross multiply
   328,200.86x = 492,257.55 × 91,523.72
4. Step 4: Simplify right side
   328,200.86x = 45,053,243,747.94
5. Step 5: Solve for x
   x = 45,053,243,747.94/328,200.86
6. Step 6: Final answer
   x = 137,273.39