Finding the Third Proportional to 286,632 and 429,900

Step by Step Solution

1. Step 1: Write the proportion equation
   286,632 : 429,900 = 429,900 : x
2. Step 2: Convert to fraction form
   286,632/429,900 = 429,900/x
3. Step 3: Cross multiply
   286,632x = 429,900 × 429,900
4. Step 4: Simplify right side
   286,632x = 184,814,010,000
5. Step 5: Solve for x
   x = 184,814,010,000/286,632
6. Step 6: Final answer
   x = 644,778.01