Finding the Third Proportional to 129,078.56 and 196,351.59

Step by Step Solution

1. Step 1: Write the proportion equation
   129,078.56 : 196,351.59 = 196,351.59 : x
2. Step 2: Convert to fraction form
   129,078.56/196,351.59 = 196,351.59/x
3. Step 3: Cross multiply
   129,078.56x = 196,351.59 × 196,351.59
4. Step 4: Simplify right side
   129,078.56x = 38,553,948,368.17
5. Step 5: Solve for x
   x = 38,553,948,368.17/129,078.56
6. Step 6: Final answer
   x = 298,685.91