Finding the Fourth Proportional to 870,149.89, 1,305,259.83 and 414,506.89

Step by Step Solution

1. Step 1: Write the proportion equation
   870,149.89 : 1,305,259.83 = 414,506.89 : x
2. Step 2: Convert to fraction form
   870,149.89/1,305,259.83 = 414,506.89/x
3. Step 3: Cross multiply
   870,149.89x = 1,305,259.83 × 414,506.89
4. Step 4: Simplify right side
   870,149.89x = 541,039,190,702.69
5. Step 5: Solve for x
   x = 541,039,190,702.69/870,149.89
6. Step 6: Final answer
   x = 621,777.00