Finding the Fourth Proportional to 1,321,099.89, 1,823,107.58 and 717,487.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,099.89 : 1,823,107.58 = 717,487.89 : x
2. Step 2: Convert to fraction form
   1,321,099.89/1,823,107.58 = 717,487.89/x
3. Step 3: Cross multiply
   1,321,099.89x = 1,823,107.58 × 717,487.89
4. Step 4: Simplify right side
   1,321,099.89x = 1,308,057,607,229.77
5. Step 5: Solve for x
   x = 1,308,057,607,229.77/1,321,099.89
6. Step 6: Final answer
   x = 990,127.71