Finding the Third Proportional to 190,395 and 405,240.75

Step by Step Solution

1. Step 1: Write the proportion equation
   190,395 : 405,240.75 = 405,240.75 : x
2. Step 2: Convert to fraction form
   190,395/405,240.75 = 405,240.75/x
3. Step 3: Cross multiply
   190,395x = 405,240.75 × 405,240.75
4. Step 4: Simplify right side
   190,395x = 164,220,065,460.56
5. Step 5: Solve for x
   x = 164,220,065,460.56/190,395
6. Step 6: Final answer
   x = 862,522.99