Finding the Fourth Proportional to 389,667.65, 584,534.57 and 136,926.27

Step by Step Solution

1. Step 1: Write the proportion equation
   389,667.65 : 584,534.57 = 136,926.27 : x
2. Step 2: Convert to fraction form
   389,667.65/584,534.57 = 136,926.27/x
3. Step 3: Cross multiply
   389,667.65x = 584,534.57 × 136,926.27
4. Step 4: Simplify right side
   389,667.65x = 80,038,137,671.52
5. Step 5: Solve for x
   x = 80,038,137,671.52/389,667.65
6. Step 6: Final answer
   x = 205,401.04