Finding the Third Proportional to 141,448 and 309,140

Step by Step Solution

1. Step 1: Write the proportion equation
   141,448 : 309,140 = 309,140 : x
2. Step 2: Convert to fraction form
   141,448/309,140 = 309,140/x
3. Step 3: Cross multiply
   141,448x = 309,140 × 309,140
4. Step 4: Simplify right side
   141,448x = 95,567,539,600
5. Step 5: Solve for x
   x = 95,567,539,600/141,448
6. Step 6: Final answer
   x = 675,637.26