Finding the Third Proportional to 409,632 and 891,072

Step by Step Solution

1. Step 1: Write the proportion equation
   409,632 : 891,072 = 891,072 : x
2. Step 2: Convert to fraction form
   409,632/891,072 = 891,072/x
3. Step 3: Cross multiply
   409,632x = 891,072 × 891,072
4. Step 4: Simplify right side
   409,632x = 794,009,309,184
5. Step 5: Solve for x
   x = 794,009,309,184/409,632
6. Step 6: Final answer
   x = 1,938,347.86