Finding the Third Proportional to 814,645 and 1,139,465

Step by Step Solution

1. Step 1: Write the proportion equation
   814,645 : 1,139,465 = 1,139,465 : x
2. Step 2: Convert to fraction form
   814,645/1,139,465 = 1,139,465/x
3. Step 3: Cross multiply
   814,645x = 1,139,465 × 1,139,465
4. Step 4: Simplify right side
   814,645x = 1,298,380,486,225
5. Step 5: Solve for x
   x = 1,298,380,486,225/814,645
6. Step 6: Final answer
   x = 1,593,799.12