Finding the Third Proportional to 787,290 and 1,689,222

Step by Step Solution

1. Step 1: Write the proportion equation
   787,290 : 1,689,222 = 1,689,222 : x
2. Step 2: Convert to fraction form
   787,290/1,689,222 = 1,689,222/x
3. Step 3: Cross multiply
   787,290x = 1,689,222 × 1,689,222
4. Step 4: Simplify right side
   787,290x = 2,853,470,965,284
5. Step 5: Solve for x
   x = 2,853,470,965,284/787,290
6. Step 6: Final answer
   x = 3,624,421.71