Finding the Third Proportional to 434,879 and 612,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   434,879 : 612,404.50 = 612,404.50 : x
2. Step 2: Convert to fraction form
   434,879/612,404.50 = 612,404.50/x
3. Step 3: Cross multiply
   434,879x = 612,404.50 × 612,404.50
4. Step 4: Simplify right side
   434,879x = 375,039,271,620.25
5. Step 5: Solve for x
   x = 375,039,271,620.25/434,879
6. Step 6: Final answer
   x = 862,399.13