Finding the Third Proportional to 318,419.25 and 432,672

Step by Step Solution

1. Step 1: Write the proportion equation
   318,419.25 : 432,672 = 432,672 : x
2. Step 2: Convert to fraction form
   318,419.25/432,672 = 432,672/x
3. Step 3: Cross multiply
   318,419.25x = 432,672 × 432,672
4. Step 4: Simplify right side
   318,419.25x = 187,205,059,584
5. Step 5: Solve for x
   x = 187,205,059,584/318,419.25
6. Step 6: Final answer
   x = 587,920.04