Finding the Third Proportional to 212,308 and 465,440

Step by Step Solution

1. Step 1: Write the proportion equation
   212,308 : 465,440 = 465,440 : x
2. Step 2: Convert to fraction form
   212,308/465,440 = 465,440/x
3. Step 3: Cross multiply
   212,308x = 465,440 × 465,440
4. Step 4: Simplify right side
   212,308x = 216,634,393,600
5. Step 5: Solve for x
   x = 216,634,393,600/212,308
6. Step 6: Final answer
   x = 1,020,377.91