Finding the Third Proportional to 139,903 and 302,143

Step by Step Solution

1. Step 1: Write the proportion equation
   139,903 : 302,143 = 302,143 : x
2. Step 2: Convert to fraction form
   139,903/302,143 = 302,143/x
3. Step 3: Cross multiply
   139,903x = 302,143 × 302,143
4. Step 4: Simplify right side
   139,903x = 91,290,392,449
5. Step 5: Solve for x
   x = 91,290,392,449/139,903
6. Step 6: Final answer
   x = 652,526.34