Finding the Third Proportional to 50,072.50 and 70,431

Step by Step Solution

1. Step 1: Write the proportion equation
   50,072.50 : 70,431 = 70,431 : x
2. Step 2: Convert to fraction form
   50,072.50/70,431 = 70,431/x
3. Step 3: Cross multiply
   50,072.50x = 70,431 × 70,431
4. Step 4: Simplify right side
   50,072.50x = 4,960,525,761
5. Step 5: Solve for x
   x = 4,960,525,761/50,072.50
6. Step 6: Final answer
   x = 99,066.87