Finding the Fourth Proportional to 105,450.89, 145,467.69 and 71,447.73

Step by Step Solution

1. Step 1: Write the proportion equation
   105,450.89 : 145,467.69 = 71,447.73 : x
2. Step 2: Convert to fraction form
   105,450.89/145,467.69 = 71,447.73/x
3. Step 3: Cross multiply
   105,450.89x = 145,467.69 × 71,447.73
4. Step 4: Simplify right side
   105,450.89x = 10,393,336,238.84
5. Step 5: Solve for x
   x = 10,393,336,238.84/105,450.89
6. Step 6: Final answer
   x = 98,560.92