Finding the Fourth Proportional to 147,889.50, 204,087.60 and 80,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   147,889.50 : 204,087.60 = 80,821.50 : x
2. Step 2: Convert to fraction form
   147,889.50/204,087.60 = 80,821.50/x
3. Step 3: Cross multiply
   147,889.50x = 204,087.60 × 80,821.50
4. Step 4: Simplify right side
   147,889.50x = 16,494,665,963.40
5. Step 5: Solve for x
   x = 16,494,665,963.40/147,889.50
6. Step 6: Final answer
   x = 111,533.72