Finding the Third Proportional to 139,332 and 230,520

Step by Step Solution

1. Step 1: Write the proportion equation
   139,332 : 230,520 = 230,520 : x
2. Step 2: Convert to fraction form
   139,332/230,520 = 230,520/x
3. Step 3: Cross multiply
   139,332x = 230,520 × 230,520
4. Step 4: Simplify right side
   139,332x = 53,139,470,400
5. Step 5: Solve for x
   x = 53,139,470,400/139,332
6. Step 6: Final answer
   x = 381,387.41