Finding the Third Proportional to 285,900 and 611,146

Step by Step Solution

1. Step 1: Write the proportion equation
   285,900 : 611,146 = 611,146 : x
2. Step 2: Convert to fraction form
   285,900/611,146 = 611,146/x
3. Step 3: Cross multiply
   285,900x = 611,146 × 611,146
4. Step 4: Simplify right side
   285,900x = 373,499,433,316
5. Step 5: Solve for x
   x = 373,499,433,316/285,900
6. Step 6: Final answer
   x = 1,306,398.86