Finding the Fourth Proportional to 228,667.88, 315,561.68 and 128,065.88

Step by Step Solution

1. Step 1: Write the proportion equation
   228,667.88 : 315,561.68 = 128,065.88 : x
2. Step 2: Convert to fraction form
   228,667.88/315,561.68 = 128,065.88/x
3. Step 3: Cross multiply
   228,667.88x = 315,561.68 × 128,065.88
4. Step 4: Simplify right side
   228,667.88x = 40,412,682,025.34
5. Step 5: Solve for x
   x = 40,412,682,025.34/228,667.88
6. Step 6: Final answer
   x = 176,730.91