Finding the Fourth Proportional to 209,078.85, 288,553.55 and 124,196.25

Step by Step Solution

1. Step 1: Write the proportion equation
   209,078.85 : 288,553.55 = 124,196.25 : x
2. Step 2: Convert to fraction form
   209,078.85/288,553.55 = 124,196.25/x
3. Step 3: Cross multiply
   209,078.85x = 288,553.55 × 124,196.25
4. Step 4: Simplify right side
   209,078.85x = 35,837,268,834.19
5. Step 5: Solve for x
   x = 35,837,268,834.19/209,078.85
6. Step 6: Final answer
   x = 171,405.52