Finding the Third Proportional to 815,386 and 1,918,558

Step by Step Solution

1. Step 1: Write the proportion equation
   815,386 : 1,918,558 = 1,918,558 : x
2. Step 2: Convert to fraction form
   815,386/1,918,558 = 1,918,558/x
3. Step 3: Cross multiply
   815,386x = 1,918,558 × 1,918,558
4. Step 4: Simplify right side
   815,386x = 3,680,864,799,364
5. Step 5: Solve for x
   x = 3,680,864,799,364/815,386
6. Step 6: Final answer
   x = 4,514,260.48