Finding the Fourth Proportional to 89,405, 123,378.40 and 48,568.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,405 : 123,378.40 = 48,568.80 : x
2. Step 2: Convert to fraction form
   89,405/123,378.40 = 48,568.80/x
3. Step 3: Cross multiply
   89,405x = 123,378.40 × 48,568.80
4. Step 4: Simplify right side
   89,405x = 5,992,340,833.92
5. Step 5: Solve for x
   x = 5,992,340,833.92/89,405
6. Step 6: Final answer
   x = 67,024.67