Finding the Fourth Proportional to 105,616.71, 145,751.07 and 63,185.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,616.71 : 145,751.07 = 63,185.25 : x
2. Step 2: Convert to fraction form
   105,616.71/145,751.07 = 63,185.25/x
3. Step 3: Cross multiply
   105,616.71x = 145,751.07 × 63,185.25
4. Step 4: Simplify right side
   105,616.71x = 9,209,317,795.72
5. Step 5: Solve for x
   x = 9,209,317,795.72/105,616.71
6. Step 6: Final answer
   x = 87,195.65