Finding the Third Proportional to 434,892 and 612,422

Step by Step Solution

1. Step 1: Write the proportion equation
   434,892 : 612,422 = 612,422 : x
2. Step 2: Convert to fraction form
   434,892/612,422 = 612,422/x
3. Step 3: Cross multiply
   434,892x = 612,422 × 612,422
4. Step 4: Simplify right side
   434,892x = 375,060,706,084
5. Step 5: Solve for x
   x = 375,060,706,084/434,892
6. Step 6: Final answer
   x = 862,422.64