Finding the Third Proportional to 15,442.31 and 31,431.38

Step by Step Solution

1. Step 1: Write the proportion equation
   15,442.31 : 31,431.38 = 31,431.38 : x
2. Step 2: Convert to fraction form
   15,442.31/31,431.38 = 31,431.38/x
3. Step 3: Cross multiply
   15,442.31x = 31,431.38 × 31,431.38
4. Step 4: Simplify right side
   15,442.31x = 987,931,334.39
5. Step 5: Solve for x
   x = 987,931,334.39/15,442.31
6. Step 6: Final answer
   x = 63,975.61