Finding the Third Proportional to 236,258 and 341,139

Step by Step Solution

1. Step 1: Write the proportion equation
   236,258 : 341,139 = 341,139 : x
2. Step 2: Convert to fraction form
   236,258/341,139 = 341,139/x
3. Step 3: Cross multiply
   236,258x = 341,139 × 341,139
4. Step 4: Simplify right side
   236,258x = 116,375,817,321
5. Step 5: Solve for x
   x = 116,375,817,321/236,258
6. Step 6: Final answer
   x = 492,579.37