Finding the Fourth Proportional to 1,662,257.69, 2,493,387.21 and 400,085.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662,257.69 : 2,493,387.21 = 400,085.31 : x
2. Step 2: Convert to fraction form
   1,662,257.69/2,493,387.21 = 400,085.31/x
3. Step 3: Cross multiply
   1,662,257.69x = 2,493,387.21 × 400,085.31
4. Step 4: Simplify right side
   1,662,257.69x = 997,567,594,862.89
5. Step 5: Solve for x
   x = 997,567,594,862.89/1,662,257.69
6. Step 6: Final answer
   x = 600,128.13