Finding the Third Proportional to 427,385 and 676,753.50

Step by Step Solution

1. Step 1: Write the proportion equation
   427,385 : 676,753.50 = 676,753.50 : x
2. Step 2: Convert to fraction form
   427,385/676,753.50 = 676,753.50/x
3. Step 3: Cross multiply
   427,385x = 676,753.50 × 676,753.50
4. Step 4: Simplify right side
   427,385x = 457,995,299,762.25
5. Step 5: Solve for x
   x = 457,995,299,762.25/427,385
6. Step 6: Final answer
   x = 1,071,622.31