Finding the Fourth Proportional to 89,308.50, 133,922.61 and 64,243.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,308.50 : 133,922.61 = 64,243.50 : x
2. Step 2: Convert to fraction form
   89,308.50/133,922.61 = 64,243.50/x
3. Step 3: Cross multiply
   89,308.50x = 133,922.61 × 64,243.50
4. Step 4: Simplify right side
   89,308.50x = 8,603,657,195.54
5. Step 5: Solve for x
   x = 8,603,657,195.54/89,308.50
6. Step 6: Final answer
   x = 96,336.38