Finding the Fourth Proportional to 1,321,697, 1,823,946.72 and 718,085

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,697 : 1,823,946.72 = 718,085 : x
2. Step 2: Convert to fraction form
   1,321,697/1,823,946.72 = 718,085/x
3. Step 3: Cross multiply
   1,321,697x = 1,823,946.72 × 718,085
4. Step 4: Simplify right side
   1,321,697x = 1,309,748,780,431.20
5. Step 5: Solve for x
   x = 1,309,748,780,431.20/1,321,697
6. Step 6: Final answer
   x = 990,959.94