Finding the Third Proportional to 648,620 and 1,381,429

Step by Step Solution

1. Step 1: Write the proportion equation
   648,620 : 1,381,429 = 1,381,429 : x
2. Step 2: Convert to fraction form
   648,620/1,381,429 = 1,381,429/x
3. Step 3: Cross multiply
   648,620x = 1,381,429 × 1,381,429
4. Step 4: Simplify right side
   648,620x = 1,908,346,082,041
5. Step 5: Solve for x
   x = 1,908,346,082,041/648,620
6. Step 6: Final answer
   x = 2,942,163.49