Finding the Third Proportional to 236,418 and 354,870

Step by Step Solution

1. Step 1: Write the proportion equation
   236,418 : 354,870 = 354,870 : x
2. Step 2: Convert to fraction form
   236,418/354,870 = 354,870/x
3. Step 3: Cross multiply
   236,418x = 354,870 × 354,870
4. Step 4: Simplify right side
   236,418x = 125,932,716,900
5. Step 5: Solve for x
   x = 125,932,716,900/236,418
6. Step 6: Final answer
   x = 532,669.75