Finding the Fourth Proportional to 1,287,606.29, 1,777,116.59 and 743,644.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,606.29 : 1,777,116.59 = 743,644.31 : x
2. Step 2: Convert to fraction form
   1,287,606.29/1,777,116.59 = 743,644.31/x
3. Step 3: Cross multiply
   1,287,606.29x = 1,777,116.59 × 743,644.31
4. Step 4: Simplify right side
   1,287,606.29x = 1,321,542,636,641.88
5. Step 5: Solve for x
   x = 1,321,542,636,641.88/1,287,606.29
6. Step 6: Final answer
   x = 1,026,356.15