Finding the Third Proportional to 665,990 and 1,456,316

Step by Step Solution

1. Step 1: Write the proportion equation
   665,990 : 1,456,316 = 1,456,316 : x
2. Step 2: Convert to fraction form
   665,990/1,456,316 = 1,456,316/x
3. Step 3: Cross multiply
   665,990x = 1,456,316 × 1,456,316
4. Step 4: Simplify right side
   665,990x = 2,120,856,291,856
5. Step 5: Solve for x
   x = 2,120,856,291,856/665,990
6. Step 6: Final answer
   x = 3,184,516.72