Finding the Fourth Proportional to 611,830.27, 844,460.82 and 339,991.63

Step by Step Solution

1. Step 1: Write the proportion equation
   611,830.27 : 844,460.82 = 339,991.63 : x
2. Step 2: Convert to fraction form
   611,830.27/844,460.82 = 339,991.63/x
3. Step 3: Cross multiply
   611,830.27x = 844,460.82 × 339,991.63
4. Step 4: Simplify right side
   611,830.27x = 287,109,610,662.94
5. Step 5: Solve for x
   x = 287,109,610,662.94/611,830.27
6. Step 6: Final answer
   x = 469,263.49