Finding the Third Proportional to 667,542 and 1,390,308

Step by Step Solution

1. Step 1: Write the proportion equation
   667,542 : 1,390,308 = 1,390,308 : x
2. Step 2: Convert to fraction form
   667,542/1,390,308 = 1,390,308/x
3. Step 3: Cross multiply
   667,542x = 1,390,308 × 1,390,308
4. Step 4: Simplify right side
   667,542x = 1,932,956,334,864
5. Step 5: Solve for x
   x = 1,932,956,334,864/667,542
6. Step 6: Final answer
   x = 2,895,632.54