Finding the Third Proportional to 490,142 and 749,630

Step by Step Solution

1. Step 1: Write the proportion equation
   490,142 : 749,630 = 749,630 : x
2. Step 2: Convert to fraction form
   490,142/749,630 = 749,630/x
3. Step 3: Cross multiply
   490,142x = 749,630 × 749,630
4. Step 4: Simplify right side
   490,142x = 561,945,136,900
5. Step 5: Solve for x
   x = 561,945,136,900/490,142
6. Step 6: Final answer
   x = 1,146,494.56