Finding the Third Proportional to 878,021 and 1,780,264

Step by Step Solution

1. Step 1: Write the proportion equation
   878,021 : 1,780,264 = 1,780,264 : x
2. Step 2: Convert to fraction form
   878,021/1,780,264 = 1,780,264/x
3. Step 3: Cross multiply
   878,021x = 1,780,264 × 1,780,264
4. Step 4: Simplify right side
   878,021x = 3,169,339,909,696
5. Step 5: Solve for x
   x = 3,169,339,909,696/878,021
6. Step 6: Final answer
   x = 3,609,640.21