Finding the Third Proportional to 681,264 and 1,478,438

Step by Step Solution

1. Step 1: Write the proportion equation
   681,264 : 1,478,438 = 1,478,438 : x
2. Step 2: Convert to fraction form
   681,264/1,478,438 = 1,478,438/x
3. Step 3: Cross multiply
   681,264x = 1,478,438 × 1,478,438
4. Step 4: Simplify right side
   681,264x = 2,185,778,919,844
5. Step 5: Solve for x
   x = 2,185,778,919,844/681,264
6. Step 6: Final answer
   x = 3,208,416.88