Finding the Third Proportional to 1,387,978 and 2,136,095

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,978 : 2,136,095 = 2,136,095 : x
2. Step 2: Convert to fraction form
   1,387,978/2,136,095 = 2,136,095/x
3. Step 3: Cross multiply
   1,387,978x = 2,136,095 × 2,136,095
4. Step 4: Simplify right side
   1,387,978x = 4,562,901,849,025
5. Step 5: Solve for x
   x = 4,562,901,849,025/1,387,978
6. Step 6: Final answer
   x = 3,287,445.37