Finding the Third Proportional to 100,613.50 and 213,219

Step by Step Solution

1. Step 1: Write the proportion equation
   100,613.50 : 213,219 = 213,219 : x
2. Step 2: Convert to fraction form
   100,613.50/213,219 = 213,219/x
3. Step 3: Cross multiply
   100,613.50x = 213,219 × 213,219
4. Step 4: Simplify right side
   100,613.50x = 45,462,341,961
5. Step 5: Solve for x
   x = 45,462,341,961/100,613.50
6. Step 6: Final answer
   x = 451,851.31