Finding the Third Proportional to 1,991,218 and 4,369,507

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991,218 : 4,369,507 = 4,369,507 : x
2. Step 2: Convert to fraction form
   1,991,218/4,369,507 = 4,369,507/x
3. Step 3: Cross multiply
   1,991,218x = 4,369,507 × 4,369,507
4. Step 4: Simplify right side
   1,991,218x = 19,092,591,423,049
5. Step 5: Solve for x
   x = 19,092,591,423,049/1,991,218
6. Step 6: Final answer
   x = 9,588,398.37