Finding the Fourth Proportional to 105,725.70, 145,825.56 and 65,426.58

Step by Step Solution

1. Step 1: Write the proportion equation
   105,725.70 : 145,825.56 = 65,426.58 : x
2. Step 2: Convert to fraction form
   105,725.70/145,825.56 = 65,426.58/x
3. Step 3: Cross multiply
   105,725.70x = 145,825.56 × 65,426.58
4. Step 4: Simplify right side
   105,725.70x = 9,540,867,667.38
5. Step 5: Solve for x
   x = 9,540,867,667.38/105,725.70
6. Step 6: Final answer
   x = 90,241.71