Finding the Third Proportional to 124,290 and 197,121.75

Step by Step Solution

1. Step 1: Write the proportion equation
   124,290 : 197,121.75 = 197,121.75 : x
2. Step 2: Convert to fraction form
   124,290/197,121.75 = 197,121.75/x
3. Step 3: Cross multiply
   124,290x = 197,121.75 × 197,121.75
4. Step 4: Simplify right side
   124,290x = 38,856,984,323.06
5. Step 5: Solve for x
   x = 38,856,984,323.06/124,290
6. Step 6: Final answer
   x = 312,631.62