Finding the Third Proportional to 1,638,928 and 2,565,322

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,928 : 2,565,322 = 2,565,322 : x
2. Step 2: Convert to fraction form
   1,638,928/2,565,322 = 2,565,322/x
3. Step 3: Cross multiply
   1,638,928x = 2,565,322 × 2,565,322
4. Step 4: Simplify right side
   1,638,928x = 6,580,876,963,684
5. Step 5: Solve for x
   x = 6,580,876,963,684/1,638,928
6. Step 6: Final answer
   x = 4,015,354.53