Finding the Third Proportional to 1,584,429 and 3,421,392

Step by Step Solution

1. Step 1: Write the proportion equation
   1,584,429 : 3,421,392 = 3,421,392 : x
2. Step 2: Convert to fraction form
   1,584,429/3,421,392 = 3,421,392/x
3. Step 3: Cross multiply
   1,584,429x = 3,421,392 × 3,421,392
4. Step 4: Simplify right side
   1,584,429x = 11,705,923,217,664
5. Step 5: Solve for x
   x = 11,705,923,217,664/1,584,429
6. Step 6: Final answer
   x = 7,388,102.10