Finding the Fourth Proportional to 388,641.69, 583,131.94 and 136,103.33

Step by Step Solution

1. Step 1: Write the proportion equation
   388,641.69 : 583,131.94 = 136,103.33 : x
2. Step 2: Convert to fraction form
   388,641.69/583,131.94 = 136,103.33/x
3. Step 3: Cross multiply
   388,641.69x = 583,131.94 × 136,103.33
4. Step 4: Simplify right side
   388,641.69x = 79,366,195,947.70
5. Step 5: Solve for x
   x = 79,366,195,947.70/388,641.69
6. Step 6: Final answer
   x = 204,214.32