Finding the Third Proportional to 191,136 and 405,060

Step by Step Solution

1. Step 1: Write the proportion equation
   191,136 : 405,060 = 405,060 : x
2. Step 2: Convert to fraction form
   191,136/405,060 = 405,060/x
3. Step 3: Cross multiply
   191,136x = 405,060 × 405,060
4. Step 4: Simplify right side
   191,136x = 164,073,603,600
5. Step 5: Solve for x
   x = 164,073,603,600/191,136
6. Step 6: Final answer
   x = 858,412.88