Finding the Fourth Proportional to 1,321,503.50, 1,823,674.84 and 717,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,503.50 : 1,823,674.84 = 717,891.50 : x
2. Step 2: Convert to fraction form
   1,321,503.50/1,823,674.84 = 717,891.50/x
3. Step 3: Cross multiply
   1,321,503.50x = 1,823,674.84 × 717,891.50
4. Step 4: Simplify right side
   1,321,503.50x = 1,309,200,666,399.86
5. Step 5: Solve for x
   x = 1,309,200,666,399.86/1,321,503.50
6. Step 6: Final answer
   x = 990,690.28