Finding the Third Proportional to 12,688.50 and 30,531

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688.50 : 30,531 = 30,531 : x
2. Step 2: Convert to fraction form
   12,688.50/30,531 = 30,531/x
3. Step 3: Cross multiply
   12,688.50x = 30,531 × 30,531
4. Step 4: Simplify right side
   12,688.50x = 932,141,961
5. Step 5: Solve for x
   x = 932,141,961/12,688.50
6. Step 6: Final answer
   x = 73,463.53