Finding the Third Proportional to 13,155.75 and 31,455

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.75 : 31,455 = 31,455 : x
2. Step 2: Convert to fraction form
   13,155.75/31,455 = 31,455/x
3. Step 3: Cross multiply
   13,155.75x = 31,455 × 31,455
4. Step 4: Simplify right side
   13,155.75x = 989,417,025
5. Step 5: Solve for x
   x = 989,417,025/13,155.75
6. Step 6: Final answer
   x = 75,207.95