Finding the Third Proportional to 284,548.50 and 428,699.25

Step by Step Solution

1. Step 1: Write the proportion equation
   284,548.50 : 428,699.25 = 428,699.25 : x
2. Step 2: Convert to fraction form
   284,548.50/428,699.25 = 428,699.25/x
3. Step 3: Cross multiply
   284,548.50x = 428,699.25 × 428,699.25
4. Step 4: Simplify right side
   284,548.50x = 183,783,046,950.56
5. Step 5: Solve for x
   x = 183,783,046,950.56/284,548.50
6. Step 6: Final answer
   x = 645,876.00