Finding the Fourth Proportional to 311,729.50, 467,672.01 and 90,113.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,729.50 : 467,672.01 = 90,113.50 : x
2. Step 2: Convert to fraction form
   311,729.50/467,672.01 = 90,113.50/x
3. Step 3: Cross multiply
   311,729.50x = 467,672.01 × 90,113.50
4. Step 4: Simplify right side
   311,729.50x = 42,143,561,673.14
5. Step 5: Solve for x
   x = 42,143,561,673.14/311,729.50
6. Step 6: Final answer
   x = 135,192.73