Finding the Third Proportional to 1,212,600 and 1,902,209

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212,600 : 1,902,209 = 1,902,209 : x
2. Step 2: Convert to fraction form
   1,212,600/1,902,209 = 1,902,209/x
3. Step 3: Cross multiply
   1,212,600x = 1,902,209 × 1,902,209
4. Step 4: Simplify right side
   1,212,600x = 3,618,399,079,681
5. Step 5: Solve for x
   x = 3,618,399,079,681/1,212,600
6. Step 6: Final answer
   x = 2,984,000.56