Finding the Third Proportional to 13,013 and 30,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,013 : 30,688.50 = 30,688.50 : x
2. Step 2: Convert to fraction form
   13,013/30,688.50 = 30,688.50/x
3. Step 3: Cross multiply
   13,013x = 30,688.50 × 30,688.50
4. Step 4: Simplify right side
   13,013x = 941,784,032.25
5. Step 5: Solve for x
   x = 941,784,032.25/13,013
6. Step 6: Final answer
   x = 72,372.55