Finding the Third Proportional to 212,422 and 463,490

Step by Step Solution

1. Step 1: Write the proportion equation
   212,422 : 463,490 = 463,490 : x
2. Step 2: Convert to fraction form
   212,422/463,490 = 463,490/x
3. Step 3: Cross multiply
   212,422x = 463,490 × 463,490
4. Step 4: Simplify right side
   212,422x = 214,822,980,100
5. Step 5: Solve for x
   x = 214,822,980,100/212,422
6. Step 6: Final answer
   x = 1,011,302.88