Finding the Third Proportional to 284,056.50 and 621,558

Step by Step Solution

1. Step 1: Write the proportion equation
   284,056.50 : 621,558 = 621,558 : x
2. Step 2: Convert to fraction form
   284,056.50/621,558 = 621,558/x
3. Step 3: Cross multiply
   284,056.50x = 621,558 × 621,558
4. Step 4: Simplify right side
   284,056.50x = 386,334,347,364
5. Step 5: Solve for x
   x = 386,334,347,364/284,056.50
6. Step 6: Final answer
   x = 1,360,061.63