Finding the Third Proportional to 21,173 and 31,175.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,173 : 31,175.50 = 31,175.50 : x
2. Step 2: Convert to fraction form
   21,173/31,175.50 = 31,175.50/x
3. Step 3: Cross multiply
   21,173x = 31,175.50 × 31,175.50
4. Step 4: Simplify right side
   21,173x = 971,911,800.25
5. Step 5: Solve for x
   x = 971,911,800.25/21,173
6. Step 6: Final answer
   x = 45,903.36