Finding the Third Proportional to 142,076 and 213,479

Step by Step Solution

1. Step 1: Write the proportion equation
   142,076 : 213,479 = 213,479 : x
2. Step 2: Convert to fraction form
   142,076/213,479 = 213,479/x
3. Step 3: Cross multiply
   142,076x = 213,479 × 213,479
4. Step 4: Simplify right side
   142,076x = 45,573,283,441
5. Step 5: Solve for x
   x = 45,573,283,441/142,076
6. Step 6: Final answer
   x = 320,766.94