Finding the Third Proportional to 454,788 and 990,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   454,788 : 990,256.50 = 990,256.50 : x
2. Step 2: Convert to fraction form
   454,788/990,256.50 = 990,256.50/x
3. Step 3: Cross multiply
   454,788x = 990,256.50 × 990,256.50
4. Step 4: Simplify right side
   454,788x = 980,607,935,792.25
5. Step 5: Solve for x
   x = 980,607,935,792.25/454,788
6. Step 6: Final answer
   x = 2,156,186.92