Finding the Third Proportional to 646,263 and 1,380,492

Step by Step Solution

1. Step 1: Write the proportion equation
   646,263 : 1,380,492 = 1,380,492 : x
2. Step 2: Convert to fraction form
   646,263/1,380,492 = 1,380,492/x
3. Step 3: Cross multiply
   646,263x = 1,380,492 × 1,380,492
4. Step 4: Simplify right side
   646,263x = 1,905,758,162,064
5. Step 5: Solve for x
   x = 1,905,758,162,064/646,263
6. Step 6: Final answer
   x = 2,948,889.48