Finding the Third Proportional to 702,956 and 1,089,390

Step by Step Solution

1. Step 1: Write the proportion equation
   702,956 : 1,089,390 = 1,089,390 : x
2. Step 2: Convert to fraction form
   702,956/1,089,390 = 1,089,390/x
3. Step 3: Cross multiply
   702,956x = 1,089,390 × 1,089,390
4. Step 4: Simplify right side
   702,956x = 1,186,770,572,100
5. Step 5: Solve for x
   x = 1,186,770,572,100/702,956
6. Step 6: Final answer
   x = 1,688,257.26