Finding the Third Proportional to 718,411 and 1,071,390

Step by Step Solution

1. Step 1: Write the proportion equation
   718,411 : 1,071,390 = 1,071,390 : x
2. Step 2: Convert to fraction form
   718,411/1,071,390 = 1,071,390/x
3. Step 3: Cross multiply
   718,411x = 1,071,390 × 1,071,390
4. Step 4: Simplify right side
   718,411x = 1,147,876,532,100
5. Step 5: Solve for x
   x = 1,147,876,532,100/718,411
6. Step 6: Final answer
   x = 1,597,799.22