Finding the Fourth Proportional to 1,361,139.38, 2,042,004.27 and 414,485.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361,139.38 : 2,042,004.27 = 414,485.30 : x
2. Step 2: Convert to fraction form
   1,361,139.38/2,042,004.27 = 414,485.30/x
3. Step 3: Cross multiply
   1,361,139.38x = 2,042,004.27 × 414,485.30
4. Step 4: Simplify right side
   1,361,139.38x = 846,380,752,452.23
5. Step 5: Solve for x
   x = 846,380,752,452.23/1,361,139.38
6. Step 6: Final answer
   x = 621,817.84