Finding the Third Proportional to 210,329 and 456,146

Step by Step Solution

1. Step 1: Write the proportion equation
   210,329 : 456,146 = 456,146 : x
2. Step 2: Convert to fraction form
   210,329/456,146 = 456,146/x
3. Step 3: Cross multiply
   210,329x = 456,146 × 456,146
4. Step 4: Simplify right side
   210,329x = 208,069,173,316
5. Step 5: Solve for x
   x = 208,069,173,316/210,329
6. Step 6: Final answer
   x = 989,255.75