Finding the Fourth Proportional to 189,710.72, 261,797.60 and 103,667.80

Step by Step Solution

1. Step 1: Write the proportion equation
   189,710.72 : 261,797.60 = 103,667.80 : x
2. Step 2: Convert to fraction form
   189,710.72/261,797.60 = 103,667.80/x
3. Step 3: Cross multiply
   189,710.72x = 261,797.60 × 103,667.80
4. Step 4: Simplify right side
   189,710.72x = 27,139,981,237.28
5. Step 5: Solve for x
   x = 27,139,981,237.28/189,710.72
6. Step 6: Final answer
   x = 143,059.82