Finding the Third Proportional to 425,700 and 619,830

Step by Step Solution

1. Step 1: Write the proportion equation
   425,700 : 619,830 = 619,830 : x
2. Step 2: Convert to fraction form
   425,700/619,830 = 619,830/x
3. Step 3: Cross multiply
   425,700x = 619,830 × 619,830
4. Step 4: Simplify right side
   425,700x = 384,189,228,900
5. Step 5: Solve for x
   x = 384,189,228,900/425,700
6. Step 6: Final answer
   x = 902,488.21