Finding the Fourth Proportional to 1,321,575.50, 1,823,775.82 and 717,963.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,575.50 : 1,823,775.82 = 717,963.50 : x
2. Step 2: Convert to fraction form
   1,321,575.50/1,823,775.82 = 717,963.50/x
3. Step 3: Cross multiply
   1,321,575.50x = 1,823,775.82 × 717,963.50
4. Step 4: Simplify right side
   1,321,575.50x = 1,309,404,470,942.57
5. Step 5: Solve for x
   x = 1,309,404,470,942.57/1,321,575.50
6. Step 6: Final answer
   x = 990,790.52