Finding the Third Proportional to 89,487 and 196,470

Step by Step Solution

1. Step 1: Write the proportion equation
   89,487 : 196,470 = 196,470 : x
2. Step 2: Convert to fraction form
   89,487/196,470 = 196,470/x
3. Step 3: Cross multiply
   89,487x = 196,470 × 196,470
4. Step 4: Simplify right side
   89,487x = 38,600,460,900
5. Step 5: Solve for x
   x = 38,600,460,900/89,487
6. Step 6: Final answer
   x = 431,352.72