Finding the Third Proportional to 190,473.75 and 405,612

Step by Step Solution

1. Step 1: Write the proportion equation
   190,473.75 : 405,612 = 405,612 : x
2. Step 2: Convert to fraction form
   190,473.75/405,612 = 405,612/x
3. Step 3: Cross multiply
   190,473.75x = 405,612 × 405,612
4. Step 4: Simplify right side
   190,473.75x = 164,521,094,544
5. Step 5: Solve for x
   x = 164,521,094,544/190,473.75
6. Step 6: Final answer
   x = 863,746.81