Finding the Third Proportional to 189,859.50 and 404,259

Step by Step Solution

1. Step 1: Write the proportion equation
   189,859.50 : 404,259 = 404,259 : x
2. Step 2: Convert to fraction form
   189,859.50/404,259 = 404,259/x
3. Step 3: Cross multiply
   189,859.50x = 404,259 × 404,259
4. Step 4: Simplify right side
   189,859.50x = 163,425,339,081
5. Step 5: Solve for x
   x = 163,425,339,081/189,859.50
6. Step 6: Final answer
   x = 860,769.88