Finding the Third Proportional to 12,901.78 and 19,836.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901.78 : 19,836.56 = 19,836.56 : x
2. Step 2: Convert to fraction form
   12,901.78/19,836.56 = 19,836.56/x
3. Step 3: Cross multiply
   12,901.78x = 19,836.56 × 19,836.56
4. Step 4: Simplify right side
   12,901.78x = 393,489,211.82
5. Step 5: Solve for x
   x = 393,489,211.82/12,901.78
6. Step 6: Final answer
   x = 30,498.83