Finding the Third Proportional to 13,339.50 and 30,878

Step by Step Solution

1. Step 1: Write the proportion equation
   13,339.50 : 30,878 = 30,878 : x
2. Step 2: Convert to fraction form
   13,339.50/30,878 = 30,878/x
3. Step 3: Cross multiply
   13,339.50x = 30,878 × 30,878
4. Step 4: Simplify right side
   13,339.50x = 953,450,884
5. Step 5: Solve for x
   x = 953,450,884/13,339.50
6. Step 6: Final answer
   x = 71,475.76