Finding the Third Proportional to 13,455 and 31,267.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,455 : 31,267.50 = 31,267.50 : x
2. Step 2: Convert to fraction form
   13,455/31,267.50 = 31,267.50/x
3. Step 3: Cross multiply
   13,455x = 31,267.50 × 31,267.50
4. Step 4: Simplify right side
   13,455x = 977,656,556.25
5. Step 5: Solve for x
   x = 977,656,556.25/13,455
6. Step 6: Final answer
   x = 72,661.21