Finding the Third Proportional to 321,028 and 429,484

Step by Step Solution

1. Step 1: Write the proportion equation
   321,028 : 429,484 = 429,484 : x
2. Step 2: Convert to fraction form
   321,028/429,484 = 429,484/x
3. Step 3: Cross multiply
   321,028x = 429,484 × 429,484
4. Step 4: Simplify right side
   321,028x = 184,456,506,256
5. Step 5: Solve for x
   x = 184,456,506,256/321,028
6. Step 6: Final answer
   x = 574,580.74