Finding the Third Proportional to 189,860 and 404,260

Step by Step Solution

1. Step 1: Write the proportion equation
   189,860 : 404,260 = 404,260 : x
2. Step 2: Convert to fraction form
   189,860/404,260 = 404,260/x
3. Step 3: Cross multiply
   189,860x = 404,260 × 404,260
4. Step 4: Simplify right side
   189,860x = 163,426,147,600
5. Step 5: Solve for x
   x = 163,426,147,600/189,860
6. Step 6: Final answer
   x = 860,771.87