Finding the Third Proportional to 149,290 and 231,148

Step by Step Solution

1. Step 1: Write the proportion equation
   149,290 : 231,148 = 231,148 : x
2. Step 2: Convert to fraction form
   149,290/231,148 = 231,148/x
3. Step 3: Cross multiply
   149,290x = 231,148 × 231,148
4. Step 4: Simplify right side
   149,290x = 53,429,397,904
5. Step 5: Solve for x
   x = 53,429,397,904/149,290
6. Step 6: Final answer
   x = 357,890.00