Finding the Third Proportional to 15,278 and 31,530

Step by Step Solution

1. Step 1: Write the proportion equation
   15,278 : 31,530 = 31,530 : x
2. Step 2: Convert to fraction form
   15,278/31,530 = 31,530/x
3. Step 3: Cross multiply
   15,278x = 31,530 × 31,530
4. Step 4: Simplify right side
   15,278x = 994,140,900
5. Step 5: Solve for x
   x = 994,140,900/15,278
6. Step 6: Final answer
   x = 65,070.09