Finding the Third Proportional to 646,272 and 1,380,516

Step by Step Solution

1. Step 1: Write the proportion equation
   646,272 : 1,380,516 = 1,380,516 : x
2. Step 2: Convert to fraction form
   646,272/1,380,516 = 1,380,516/x
3. Step 3: Cross multiply
   646,272x = 1,380,516 × 1,380,516
4. Step 4: Simplify right side
   646,272x = 1,905,824,426,256
5. Step 5: Solve for x
   x = 1,905,824,426,256/646,272
6. Step 6: Final answer
   x = 2,948,950.95