Finding the Fourth Proportional to 311,665.50, 467,576.01 and 90,049.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,665.50 : 467,576.01 = 90,049.50 : x
2. Step 2: Convert to fraction form
   311,665.50/467,576.01 = 90,049.50/x
3. Step 3: Cross multiply
   311,665.50x = 467,576.01 × 90,049.50
4. Step 4: Simplify right side
   311,665.50x = 42,104,985,912.50
5. Step 5: Solve for x
   x = 42,104,985,912.50/311,665.50
6. Step 6: Final answer
   x = 135,096.72