Finding the Third Proportional to 87,156 and 188,136

Step by Step Solution

1. Step 1: Write the proportion equation
   87,156 : 188,136 = 188,136 : x
2. Step 2: Convert to fraction form
   87,156/188,136 = 188,136/x
3. Step 3: Cross multiply
   87,156x = 188,136 × 188,136
4. Step 4: Simplify right side
   87,156x = 35,395,154,496
5. Step 5: Solve for x
   x = 35,395,154,496/87,156
6. Step 6: Final answer
   x = 406,112.65