Finding the Fourth Proportional to 189,667.97, 261,759.89 and 103,640.02

Step by Step Solution

1. Step 1: Write the proportion equation
   189,667.97 : 261,759.89 = 103,640.02 : x
2. Step 2: Convert to fraction form
   189,667.97/261,759.89 = 103,640.02/x
3. Step 3: Cross multiply
   189,667.97x = 261,759.89 × 103,640.02
4. Step 4: Simplify right side
   189,667.97x = 27,128,800,234.80
5. Step 5: Solve for x
   x = 27,128,800,234.80/189,667.97
6. Step 6: Final answer
   x = 143,033.11