Finding the Third Proportional to 454,729.50 and 990,190

Step by Step Solution

1. Step 1: Write the proportion equation
   454,729.50 : 990,190 = 990,190 : x
2. Step 2: Convert to fraction form
   454,729.50/990,190 = 990,190/x
3. Step 3: Cross multiply
   454,729.50x = 990,190 × 990,190
4. Step 4: Simplify right side
   454,729.50x = 980,476,236,100
5. Step 5: Solve for x
   x = 980,476,236,100/454,729.50
6. Step 6: Final answer
   x = 2,156,174.68