Finding the Fourth Proportional to 561,401.69, 842,436.05 and 206,664.82

Step by Step Solution

1. Step 1: Write the proportion equation
   561,401.69 : 842,436.05 = 206,664.82 : x
2. Step 2: Convert to fraction form
   561,401.69/842,436.05 = 206,664.82/x
3. Step 3: Cross multiply
   561,401.69x = 842,436.05 × 206,664.82
4. Step 4: Simplify right side
   561,401.69x = 174,101,891,495.35
5. Step 5: Solve for x
   x = 174,101,891,495.35/561,401.69
6. Step 6: Final answer
   x = 310,120.00