Finding the Third Proportional to 142,898 and 310,426

Step by Step Solution

1. Step 1: Write the proportion equation
   142,898 : 310,426 = 310,426 : x
2. Step 2: Convert to fraction form
   142,898/310,426 = 310,426/x
3. Step 3: Cross multiply
   142,898x = 310,426 × 310,426
4. Step 4: Simplify right side
   142,898x = 96,364,301,476
5. Step 5: Solve for x
   x = 96,364,301,476/142,898
6. Step 6: Final answer
   x = 674,357.24