Finding the Third Proportional to 639,500 and 1,381,465

Step by Step Solution

1. Step 1: Write the proportion equation
   639,500 : 1,381,465 = 1,381,465 : x
2. Step 2: Convert to fraction form
   639,500/1,381,465 = 1,381,465/x
3. Step 3: Cross multiply
   639,500x = 1,381,465 × 1,381,465
4. Step 4: Simplify right side
   639,500x = 1,908,445,546,225
5. Step 5: Solve for x
   x = 1,908,445,546,225/639,500
6. Step 6: Final answer
   x = 2,984,277.63