Finding the Third Proportional to 211,020 and 498,138

Step by Step Solution

1. Step 1: Write the proportion equation
   211,020 : 498,138 = 498,138 : x
2. Step 2: Convert to fraction form
   211,020/498,138 = 498,138/x
3. Step 3: Cross multiply
   211,020x = 498,138 × 498,138
4. Step 4: Simplify right side
   211,020x = 248,141,467,044
5. Step 5: Solve for x
   x = 248,141,467,044/211,020
6. Step 6: Final answer
   x = 1,175,914.45