Finding the Third Proportional to 86,470 and 186,280

Step by Step Solution

1. Step 1: Write the proportion equation
   86,470 : 186,280 = 186,280 : x
2. Step 2: Convert to fraction form
   86,470/186,280 = 186,280/x
3. Step 3: Cross multiply
   86,470x = 186,280 × 186,280
4. Step 4: Simplify right side
   86,470x = 34,700,238,400
5. Step 5: Solve for x
   x = 34,700,238,400/86,470
6. Step 6: Final answer
   x = 401,298.00