Finding the Third Proportional to 703,258 and 1,089,636

Step by Step Solution

1. Step 1: Write the proportion equation
   703,258 : 1,089,636 = 1,089,636 : x
2. Step 2: Convert to fraction form
   703,258/1,089,636 = 1,089,636/x
3. Step 3: Cross multiply
   703,258x = 1,089,636 × 1,089,636
4. Step 4: Simplify right side
   703,258x = 1,187,306,612,496
5. Step 5: Solve for x
   x = 1,187,306,612,496/703,258
6. Step 6: Final answer
   x = 1,688,294.50