Finding the Third Proportional to 189,307 and 404,878

Step by Step Solution

1. Step 1: Write the proportion equation
   189,307 : 404,878 = 404,878 : x
2. Step 2: Convert to fraction form
   189,307/404,878 = 404,878/x
3. Step 3: Cross multiply
   189,307x = 404,878 × 404,878
4. Step 4: Simplify right side
   189,307x = 163,926,194,884
5. Step 5: Solve for x
   x = 163,926,194,884/189,307
6. Step 6: Final answer
   x = 865,927.80