Finding the Third Proportional to 642,740 and 1,227,160

Step by Step Solution

1. Step 1: Write the proportion equation
   642,740 : 1,227,160 = 1,227,160 : x
2. Step 2: Convert to fraction form
   642,740/1,227,160 = 1,227,160/x
3. Step 3: Cross multiply
   642,740x = 1,227,160 × 1,227,160
4. Step 4: Simplify right side
   642,740x = 1,505,921,665,600
5. Step 5: Solve for x
   x = 1,505,921,665,600/642,740
6. Step 6: Final answer
   x = 2,342,971.75