Finding the Third Proportional to 210,377 and 456,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,377 : 456,421.50 = 456,421.50 : x
2. Step 2: Convert to fraction form
   210,377/456,421.50 = 456,421.50/x
3. Step 3: Cross multiply
   210,377x = 456,421.50 × 456,421.50
4. Step 4: Simplify right side
   210,377x = 208,320,585,662.25
5. Step 5: Solve for x
   x = 208,320,585,662.25/210,377
6. Step 6: Final answer
   x = 990,225.10