Finding the Fourth Proportional to 105,123, 145,069.74 and 67,448.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,123 : 145,069.74 = 67,448.28 : x
2. Step 2: Convert to fraction form
   105,123/145,069.74 = 67,448.28/x
3. Step 3: Cross multiply
   105,123x = 145,069.74 × 67,448.28
4. Step 4: Simplify right side
   105,123x = 9,784,704,443.05
5. Step 5: Solve for x
   x = 9,784,704,443.05/105,123
6. Step 6: Final answer
   x = 93,078.63