Finding the Third Proportional to 191,090 and 404,959

Step by Step Solution

1. Step 1: Write the proportion equation
   191,090 : 404,959 = 404,959 : x
2. Step 2: Convert to fraction form
   191,090/404,959 = 404,959/x
3. Step 3: Cross multiply
   191,090x = 404,959 × 404,959
4. Step 4: Simplify right side
   191,090x = 163,991,791,681
5. Step 5: Solve for x
   x = 163,991,791,681/191,090
6. Step 6: Final answer
   x = 858,191.38