Finding the Third Proportional to 434,934 and 612,488

Step by Step Solution

1. Step 1: Write the proportion equation
   434,934 : 612,488 = 612,488 : x
2. Step 2: Convert to fraction form
   434,934/612,488 = 612,488/x
3. Step 3: Cross multiply
   434,934x = 612,488 × 612,488
4. Step 4: Simplify right side
   434,934x = 375,141,550,144
5. Step 5: Solve for x
   x = 375,141,550,144/434,934
6. Step 6: Final answer
   x = 862,525.23