Finding the Fourth Proportional to 105,531.39, 145,640.43 and 60,218.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105,531.39 : 145,640.43 = 60,218.37 : x
2. Step 2: Convert to fraction form
   105,531.39/145,640.43 = 60,218.37/x
3. Step 3: Cross multiply
   105,531.39x = 145,640.43 × 60,218.37
4. Step 4: Simplify right side
   105,531.39x = 8,770,229,300.70
5. Step 5: Solve for x
   x = 8,770,229,300.70/105,531.39
6. Step 6: Final answer
   x = 83,105.41