Finding the Third Proportional to 1,584,420 and 3,421,371

Step by Step Solution

1. Step 1: Write the proportion equation
   1,584,420 : 3,421,371 = 3,421,371 : x
2. Step 2: Convert to fraction form
   1,584,420/3,421,371 = 3,421,371/x
3. Step 3: Cross multiply
   1,584,420x = 3,421,371 × 3,421,371
4. Step 4: Simplify right side
   1,584,420x = 11,705,779,519,641
5. Step 5: Solve for x
   x = 11,705,779,519,641/1,584,420
6. Step 6: Final answer
   x = 7,388,053.37