Finding the Third Proportional to 300,130 and 457,818

Step by Step Solution

1. Step 1: Write the proportion equation
   300,130 : 457,818 = 457,818 : x
2. Step 2: Convert to fraction form
   300,130/457,818 = 457,818/x
3. Step 3: Cross multiply
   300,130x = 457,818 × 457,818
4. Step 4: Simplify right side
   300,130x = 209,597,321,124
5. Step 5: Solve for x
   x = 209,597,321,124/300,130
6. Step 6: Final answer
   x = 698,355.12