Finding the Third Proportional to 108,390 and 231,804

Step by Step Solution

1. Step 1: Write the proportion equation
   108,390 : 231,804 = 231,804 : x
2. Step 2: Convert to fraction form
   108,390/231,804 = 231,804/x
3. Step 3: Cross multiply
   108,390x = 231,804 × 231,804
4. Step 4: Simplify right side
   108,390x = 53,733,094,416
5. Step 5: Solve for x
   x = 53,733,094,416/108,390
6. Step 6: Final answer
   x = 495,738.49