Finding the Fourth Proportional to 105,613.43, 145,743.37 and 57,865.14

Step by Step Solution

1. Step 1: Write the proportion equation
   105,613.43 : 145,743.37 = 57,865.14 : x
2. Step 2: Convert to fraction form
   105,613.43/145,743.37 = 57,865.14/x
3. Step 3: Cross multiply
   105,613.43x = 145,743.37 × 57,865.14
4. Step 4: Simplify right side
   105,613.43x = 8,433,460,364.46
5. Step 5: Solve for x
   x = 8,433,460,364.46/105,613.43
6. Step 6: Final answer
   x = 79,852.16