Finding the Third Proportional to 190,034 and 401,428

Step by Step Solution

1. Step 1: Write the proportion equation
   190,034 : 401,428 = 401,428 : x
2. Step 2: Convert to fraction form
   190,034/401,428 = 401,428/x
3. Step 3: Cross multiply
   190,034x = 401,428 × 401,428
4. Step 4: Simplify right side
   190,034x = 161,144,439,184
5. Step 5: Solve for x
   x = 161,144,439,184/190,034
6. Step 6: Final answer
   x = 847,976.88