Finding the Fourth Proportional to 105,147.84, 145,103.88 and 67,422

Step by Step Solution

1. Step 1: Write the proportion equation
   105,147.84 : 145,103.88 = 67,422 : x
2. Step 2: Convert to fraction form
   105,147.84/145,103.88 = 67,422/x
3. Step 3: Cross multiply
   105,147.84x = 145,103.88 × 67,422
4. Step 4: Simplify right side
   105,147.84x = 9,783,193,797.36
5. Step 5: Solve for x
   x = 9,783,193,797.36/105,147.84
6. Step 6: Final answer
   x = 93,042.27