Finding the Third Proportional to 815,384 and 1,918,553

Step by Step Solution

1. Step 1: Write the proportion equation
   815,384 : 1,918,553 = 1,918,553 : x
2. Step 2: Convert to fraction form
   815,384/1,918,553 = 1,918,553/x
3. Step 3: Cross multiply
   815,384x = 1,918,553 × 1,918,553
4. Step 4: Simplify right side
   815,384x = 3,680,845,613,809
5. Step 5: Solve for x
   x = 3,680,845,613,809/815,384
6. Step 6: Final answer
   x = 4,514,248.03