Finding the Third Proportional to 228,478 and 495,090

Step by Step Solution

1. Step 1: Write the proportion equation
   228,478 : 495,090 = 495,090 : x
2. Step 2: Convert to fraction form
   228,478/495,090 = 495,090/x
3. Step 3: Cross multiply
   228,478x = 495,090 × 495,090
4. Step 4: Simplify right side
   228,478x = 245,114,108,100
5. Step 5: Solve for x
   x = 245,114,108,100/228,478
6. Step 6: Final answer
   x = 1,072,812.74