Finding the Third Proportional to 210,582 and 456,156

Step by Step Solution

1. Step 1: Write the proportion equation
   210,582 : 456,156 = 456,156 : x
2. Step 2: Convert to fraction form
   210,582/456,156 = 456,156/x
3. Step 3: Cross multiply
   210,582x = 456,156 × 456,156
4. Step 4: Simplify right side
   210,582x = 208,078,296,336
5. Step 5: Solve for x
   x = 208,078,296,336/210,582
6. Step 6: Final answer
   x = 988,110.55