Finding the Fourth Proportional to 105,698.72, 145,865.40 and 60,382.68

Step by Step Solution

1. Step 1: Write the proportion equation
   105,698.72 : 145,865.40 = 60,382.68 : x
2. Step 2: Convert to fraction form
   105,698.72/145,865.40 = 60,382.68/x
3. Step 3: Cross multiply
   105,698.72x = 145,865.40 × 60,382.68
4. Step 4: Simplify right side
   105,698.72x = 8,807,743,771.27
5. Step 5: Solve for x
   x = 8,807,743,771.27/105,698.72
6. Step 6: Final answer
   x = 83,328.76