Finding the Third Proportional to 990,738 and 1,170,072

Step by Step Solution

1. Step 1: Write the proportion equation
   990,738 : 1,170,072 = 1,170,072 : x
2. Step 2: Convert to fraction form
   990,738/1,170,072 = 1,170,072/x
3. Step 3: Cross multiply
   990,738x = 1,170,072 × 1,170,072
4. Step 4: Simplify right side
   990,738x = 1,369,068,485,184
5. Step 5: Solve for x
   x = 1,369,068,485,184/990,738
6. Step 6: Final answer
   x = 1,381,867.34