Finding the Fourth Proportional to 1,200,485.98, 1,800,064.21 and 491,012.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,485.98 : 1,800,064.21 = 491,012.25 : x
2. Step 2: Convert to fraction form
   1,200,485.98/1,800,064.21 = 491,012.25/x
3. Step 3: Cross multiply
   1,200,485.98x = 1,800,064.21 × 491,012.25
4. Step 4: Simplify right side
   1,200,485.98x = 883,853,577,896.57
5. Step 5: Solve for x
   x = 883,853,577,896.57/1,200,485.98
6. Step 6: Final answer
   x = 736,246.48