Finding the Third Proportional to 86,470 and 188,090

Step by Step Solution

1. Step 1: Write the proportion equation
   86,470 : 188,090 = 188,090 : x
2. Step 2: Convert to fraction form
   86,470/188,090 = 188,090/x
3. Step 3: Cross multiply
   86,470x = 188,090 × 188,090
4. Step 4: Simplify right side
   86,470x = 35,377,848,100
5. Step 5: Solve for x
   x = 35,377,848,100/86,470
6. Step 6: Final answer
   x = 409,134.36