Finding the Third Proportional to 515,432 and 1,066,221

Step by Step Solution

1. Step 1: Write the proportion equation
   515,432 : 1,066,221 = 1,066,221 : x
2. Step 2: Convert to fraction form
   515,432/1,066,221 = 1,066,221/x
3. Step 3: Cross multiply
   515,432x = 1,066,221 × 1,066,221
4. Step 4: Simplify right side
   515,432x = 1,136,827,220,841
5. Step 5: Solve for x
   x = 1,136,827,220,841/515,432
6. Step 6: Final answer
   x = 2,205,581.38