Finding the Third Proportional to 210,558 and 456,586.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,558 : 456,586.50 = 456,586.50 : x
2. Step 2: Convert to fraction form
   210,558/456,586.50 = 456,586.50/x
3. Step 3: Cross multiply
   210,558x = 456,586.50 × 456,586.50
4. Step 4: Simplify right side
   210,558x = 208,471,231,982.25
5. Step 5: Solve for x
   x = 208,471,231,982.25/210,558
6. Step 6: Final answer
   x = 990,089.34