Finding the Third Proportional to 213,298.50 and 459,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,298.50 : 459,112.50 = 459,112.50 : x
2. Step 2: Convert to fraction form
   213,298.50/459,112.50 = 459,112.50/x
3. Step 3: Cross multiply
   213,298.50x = 459,112.50 × 459,112.50
4. Step 4: Simplify right side
   213,298.50x = 210,784,287,656.25
5. Step 5: Solve for x
   x = 210,784,287,656.25/213,298.50
6. Step 6: Final answer
   x = 988,212.70