Finding the Third Proportional to 231,320 and 345,060

Step by Step Solution

1. Step 1: Write the proportion equation
   231,320 : 345,060 = 345,060 : x
2. Step 2: Convert to fraction form
   231,320/345,060 = 345,060/x
3. Step 3: Cross multiply
   231,320x = 345,060 × 345,060
4. Step 4: Simplify right side
   231,320x = 119,066,403,600
5. Step 5: Solve for x
   x = 119,066,403,600/231,320
6. Step 6: Final answer
   x = 514,725.94