Finding the Third Proportional to 249,072 and 389,162

Step by Step Solution

1. Step 1: Write the proportion equation
   249,072 : 389,162 = 389,162 : x
2. Step 2: Convert to fraction form
   249,072/389,162 = 389,162/x
3. Step 3: Cross multiply
   249,072x = 389,162 × 389,162
4. Step 4: Simplify right side
   249,072x = 151,447,062,244
5. Step 5: Solve for x
   x = 151,447,062,244/249,072
6. Step 6: Final answer
   x = 608,045.31