Finding the Fourth Proportional to 311,496.80, 467,323.20 and 89,880.80

Step by Step Solution

1. Step 1: Write the proportion equation
   311,496.80 : 467,323.20 = 89,880.80 : x
2. Step 2: Convert to fraction form
   311,496.80/467,323.20 = 89,880.80/x
3. Step 3: Cross multiply
   311,496.80x = 467,323.20 × 89,880.80
4. Step 4: Simplify right side
   311,496.80x = 42,003,383,074.56
5. Step 5: Solve for x
   x = 42,003,383,074.56/311,496.80
6. Step 6: Final answer
   x = 134,843.71