Finding the Third Proportional to 190,521 and 402,426

Step by Step Solution

1. Step 1: Write the proportion equation
   190,521 : 402,426 = 402,426 : x
2. Step 2: Convert to fraction form
   190,521/402,426 = 402,426/x
3. Step 3: Cross multiply
   190,521x = 402,426 × 402,426
4. Step 4: Simplify right side
   190,521x = 161,946,685,476
5. Step 5: Solve for x
   x = 161,946,685,476/190,521
6. Step 6: Final answer
   x = 850,020.13