Finding the Fourth Proportional to 119,667.87, 165,139.40 and 65,220.49

Step by Step Solution

1. Step 1: Write the proportion equation
   119,667.87 : 165,139.40 = 65,220.49 : x
2. Step 2: Convert to fraction form
   119,667.87/165,139.40 = 65,220.49/x
3. Step 3: Cross multiply
   119,667.87x = 165,139.40 × 65,220.49
4. Step 4: Simplify right side
   119,667.87x = 10,770,472,586.31
5. Step 5: Solve for x
   x = 10,770,472,586.31/119,667.87
6. Step 6: Final answer
   x = 90,003.04