Finding the Fourth Proportional to 105,008.50, 144,906.46 and 59,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,008.50 : 144,906.46 = 59,680.50 : x
2. Step 2: Convert to fraction form
   105,008.50/144,906.46 = 59,680.50/x
3. Step 3: Cross multiply
   105,008.50x = 144,906.46 × 59,680.50
4. Step 4: Simplify right side
   105,008.50x = 8,648,089,986.03
5. Step 5: Solve for x
   x = 8,648,089,986.03/105,008.50
6. Step 6: Final answer
   x = 82,356.09