Finding the Third Proportional to 139,516 and 302,816

Step by Step Solution

1. Step 1: Write the proportion equation
   139,516 : 302,816 = 302,816 : x
2. Step 2: Convert to fraction form
   139,516/302,816 = 302,816/x
3. Step 3: Cross multiply
   139,516x = 302,816 × 302,816
4. Step 4: Simplify right side
   139,516x = 91,697,529,856
5. Step 5: Solve for x
   x = 91,697,529,856/139,516
6. Step 6: Final answer
   x = 657,254.58