Finding the Third Proportional to 86,672 and 188,158

Step by Step Solution

1. Step 1: Write the proportion equation
   86,672 : 188,158 = 188,158 : x
2. Step 2: Convert to fraction form
   86,672/188,158 = 188,158/x
3. Step 3: Cross multiply
   86,672x = 188,158 × 188,158
4. Step 4: Simplify right side
   86,672x = 35,403,432,964
5. Step 5: Solve for x
   x = 35,403,432,964/86,672
6. Step 6: Final answer
   x = 408,476.01