Finding the Fourth Proportional to 315,820.01, 435,530.39 and 206,761.61

Step by Step Solution

1. Step 1: Write the proportion equation
   315,820.01 : 435,530.39 = 206,761.61 : x
2. Step 2: Convert to fraction form
   315,820.01/435,530.39 = 206,761.61/x
3. Step 3: Cross multiply
   315,820.01x = 435,530.39 × 206,761.61
4. Step 4: Simplify right side
   315,820.01x = 90,050,964,640.33
5. Step 5: Solve for x
   x = 90,050,964,640.33/315,820.01
6. Step 6: Final answer
   x = 285,133.82