Finding the Third Proportional to 490,128 and 749,610

Step by Step Solution

1. Step 1: Write the proportion equation
   490,128 : 749,610 = 749,610 : x
2. Step 2: Convert to fraction form
   490,128/749,610 = 749,610/x
3. Step 3: Cross multiply
   490,128x = 749,610 × 749,610
4. Step 4: Simplify right side
   490,128x = 561,915,152,100
5. Step 5: Solve for x
   x = 561,915,152,100/490,128
6. Step 6: Final answer
   x = 1,146,466.13