Finding the Fourth Proportional to 328,239.96, 492,442.89 and 91,582.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,239.96 : 492,442.89 = 91,582.50 : x
2. Step 2: Convert to fraction form
   328,239.96/492,442.89 = 91,582.50/x
3. Step 3: Cross multiply
   328,239.96x = 492,442.89 × 91,582.50
4. Step 4: Simplify right side
   328,239.96x = 45,099,150,973.43
5. Step 5: Solve for x
   x = 45,099,150,973.43/328,239.96
6. Step 6: Final answer
   x = 137,396.89