Finding the Third Proportional to 354,638 and 530,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   354,638 : 530,700.50 = 530,700.50 : x
2. Step 2: Convert to fraction form
   354,638/530,700.50 = 530,700.50/x
3. Step 3: Cross multiply
   354,638x = 530,700.50 × 530,700.50
4. Step 4: Simplify right side
   354,638x = 281,643,020,700.25
5. Step 5: Solve for x
   x = 281,643,020,700.25/354,638
6. Step 6: Final answer
   x = 794,170.45