Finding the Fourth Proportional to 105,013.50, 144,913.36 and 59,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,013.50 : 144,913.36 = 59,685.50 : x
2. Step 2: Convert to fraction form
   105,013.50/144,913.36 = 59,685.50/x
3. Step 3: Cross multiply
   105,013.50x = 144,913.36 × 59,685.50
4. Step 4: Simplify right side
   105,013.50x = 8,649,226,348.28
5. Step 5: Solve for x
   x = 8,649,226,348.28/105,013.50
6. Step 6: Final answer
   x = 82,362.99