Finding the Third Proportional to 231,315 and 345,053

Step by Step Solution

1. Step 1: Write the proportion equation
   231,315 : 345,053 = 345,053 : x
2. Step 2: Convert to fraction form
   231,315/345,053 = 345,053/x
3. Step 3: Cross multiply
   231,315x = 345,053 × 345,053
4. Step 4: Simplify right side
   231,315x = 119,061,572,809
5. Step 5: Solve for x
   x = 119,061,572,809/231,315
6. Step 6: Final answer
   x = 514,716.18