Finding the Third Proportional to 213,085 and 459,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,085 : 459,380.50 = 459,380.50 : x
2. Step 2: Convert to fraction form
   213,085/459,380.50 = 459,380.50/x
3. Step 3: Cross multiply
   213,085x = 459,380.50 × 459,380.50
4. Step 4: Simplify right side
   213,085x = 211,030,443,780.25
5. Step 5: Solve for x
   x = 211,030,443,780.25/213,085
6. Step 6: Final answer
   x = 990,358.04