Finding the Third Proportional to 190,890 and 302,215.50

Step by Step Solution

1. Step 1: Write the proportion equation
   190,890 : 302,215.50 = 302,215.50 : x
2. Step 2: Convert to fraction form
   190,890/302,215.50 = 302,215.50/x
3. Step 3: Cross multiply
   190,890x = 302,215.50 × 302,215.50
4. Step 4: Simplify right side
   190,890x = 91,334,208,440.25
5. Step 5: Solve for x
   x = 91,334,208,440.25/190,890
6. Step 6: Final answer
   x = 478,465.13