Finding the Third Proportional to 1,919,390 and 4,200,364

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919,390 : 4,200,364 = 4,200,364 : x
2. Step 2: Convert to fraction form
   1,919,390/4,200,364 = 4,200,364/x
3. Step 3: Cross multiply
   1,919,390x = 4,200,364 × 4,200,364
4. Step 4: Simplify right side
   1,919,390x = 17,643,057,732,496
5. Step 5: Solve for x
   x = 17,643,057,732,496/1,919,390
6. Step 6: Final answer
   x = 9,192,012.95