Finding the Third Proportional to 149,216 and 231,388

Step by Step Solution

1. Step 1: Write the proportion equation
   149,216 : 231,388 = 231,388 : x
2. Step 2: Convert to fraction form
   149,216/231,388 = 231,388/x
3. Step 3: Cross multiply
   149,216x = 231,388 × 231,388
4. Step 4: Simplify right side
   149,216x = 53,540,406,544
5. Step 5: Solve for x
   x = 53,540,406,544/149,216
6. Step 6: Final answer
   x = 358,811.43