Finding the Third Proportional to 67,188 and 100,431

Step by Step Solution

1. Step 1: Write the proportion equation
   67,188 : 100,431 = 100,431 : x
2. Step 2: Convert to fraction form
   67,188/100,431 = 100,431/x
3. Step 3: Cross multiply
   67,188x = 100,431 × 100,431
4. Step 4: Simplify right side
   67,188x = 10,086,385,761
5. Step 5: Solve for x
   x = 10,086,385,761/67,188
6. Step 6: Final answer
   x = 150,121.83