Finding the Third Proportional to 284,553 and 428,707.69

Step by Step Solution

1. Step 1: Write the proportion equation
   284,553 : 428,707.69 = 428,707.69 : x
2. Step 2: Convert to fraction form
   284,553/428,707.69 = 428,707.69/x
3. Step 3: Cross multiply
   284,553x = 428,707.69 × 428,707.69
4. Step 4: Simplify right side
   284,553x = 183,790,281,321.60
5. Step 5: Solve for x
   x = 183,790,281,321.60/284,553
6. Step 6: Final answer
   x = 645,891.21