Finding the Third Proportional to 820,688 and 1,236,432

Step by Step Solution

1. Step 1: Write the proportion equation
   820,688 : 1,236,432 = 1,236,432 : x
2. Step 2: Convert to fraction form
   820,688/1,236,432 = 1,236,432/x
3. Step 3: Cross multiply
   820,688x = 1,236,432 × 1,236,432
4. Step 4: Simplify right side
   820,688x = 1,528,764,090,624
5. Step 5: Solve for x
   x = 1,528,764,090,624/820,688
6. Step 6: Final answer
   x = 1,862,783.53