Finding the Third Proportional to 642,738 and 1,227,156

Step by Step Solution

1. Step 1: Write the proportion equation
   642,738 : 1,227,156 = 1,227,156 : x
2. Step 2: Convert to fraction form
   642,738/1,227,156 = 1,227,156/x
3. Step 3: Cross multiply
   642,738x = 1,227,156 × 1,227,156
4. Step 4: Simplify right side
   642,738x = 1,505,911,848,336
5. Step 5: Solve for x
   x = 1,505,911,848,336/642,738
6. Step 6: Final answer
   x = 2,342,963.77