Finding the Third Proportional to 1,418,312 and 2,128,464

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418,312 : 2,128,464 = 2,128,464 : x
2. Step 2: Convert to fraction form
   1,418,312/2,128,464 = 2,128,464/x
3. Step 3: Cross multiply
   1,418,312x = 2,128,464 × 2,128,464
4. Step 4: Simplify right side
   1,418,312x = 4,530,358,999,296
5. Step 5: Solve for x
   x = 4,530,358,999,296/1,418,312
6. Step 6: Final answer
   x = 3,194,190.70