Finding the Fourth Proportional to 105,290.88, 145,258 and 73,478.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,290.88 : 145,258 = 73,478.24 : x
2. Step 2: Convert to fraction form
   105,290.88/145,258 = 73,478.24/x
3. Step 3: Cross multiply
   105,290.88x = 145,258 × 73,478.24
4. Step 4: Simplify right side
   105,290.88x = 10,673,302,185.92
5. Step 5: Solve for x
   x = 10,673,302,185.92/105,290.88
6. Step 6: Final answer
   x = 101,369.67