Finding the Third Proportional to 718,321 and 1,075,503

Step by Step Solution

1. Step 1: Write the proportion equation
   718,321 : 1,075,503 = 1,075,503 : x
2. Step 2: Convert to fraction form
   718,321/1,075,503 = 1,075,503/x
3. Step 3: Cross multiply
   718,321x = 1,075,503 × 1,075,503
4. Step 4: Simplify right side
   718,321x = 1,156,706,703,009
5. Step 5: Solve for x
   x = 1,156,706,703,009/718,321
6. Step 6: Final answer
   x = 1,610,292.20