Finding the Third Proportional to 12,958.31 and 19,812.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,958.31 : 19,812.94 = 19,812.94 : x
2. Step 2: Convert to fraction form
   12,958.31/19,812.94 = 19,812.94/x
3. Step 3: Cross multiply
   12,958.31x = 19,812.94 × 19,812.94
4. Step 4: Simplify right side
   12,958.31x = 392,552,492.38
5. Step 5: Solve for x
   x = 392,552,492.38/12,958.31
6. Step 6: Final answer
   x = 30,293.49