Finding the Third Proportional to 197,146.50 and 278,958

Step by Step Solution

1. Step 1: Write the proportion equation
   197,146.50 : 278,958 = 278,958 : x
2. Step 2: Convert to fraction form
   197,146.50/278,958 = 278,958/x
3. Step 3: Cross multiply
   197,146.50x = 278,958 × 278,958
4. Step 4: Simplify right side
   197,146.50x = 77,817,565,764
5. Step 5: Solve for x
   x = 77,817,565,764/197,146.50
6. Step 6: Final answer
   x = 394,719.49