Finding the Third Proportional to 404,726 and 613,139

Step by Step Solution

1. Step 1: Write the proportion equation
   404,726 : 613,139 = 613,139 : x
2. Step 2: Convert to fraction form
   404,726/613,139 = 613,139/x
3. Step 3: Cross multiply
   404,726x = 613,139 × 613,139
4. Step 4: Simplify right side
   404,726x = 375,939,433,321
5. Step 5: Solve for x
   x = 375,939,433,321/404,726
6. Step 6: Final answer
   x = 928,873.94