Finding the Third Proportional to 109,639 and 236,196

Step by Step Solution

1. Step 1: Write the proportion equation
   109,639 : 236,196 = 236,196 : x
2. Step 2: Convert to fraction form
   109,639/236,196 = 236,196/x
3. Step 3: Cross multiply
   109,639x = 236,196 × 236,196
4. Step 4: Simplify right side
   109,639x = 55,788,550,416
5. Step 5: Solve for x
   x = 55,788,550,416/109,639
6. Step 6: Final answer
   x = 508,838.56