Finding the Third Proportional to 295,490 and 443,142

Step by Step Solution

1. Step 1: Write the proportion equation
   295,490 : 443,142 = 443,142 : x
2. Step 2: Convert to fraction form
   295,490/443,142 = 443,142/x
3. Step 3: Cross multiply
   295,490x = 443,142 × 443,142
4. Step 4: Simplify right side
   295,490x = 196,374,832,164
5. Step 5: Solve for x
   x = 196,374,832,164/295,490
6. Step 6: Final answer
   x = 664,573.53