Finding the Third Proportional to 345,188 and 753,131

Step by Step Solution

1. Step 1: Write the proportion equation
   345,188 : 753,131 = 753,131 : x
2. Step 2: Convert to fraction form
   345,188/753,131 = 753,131/x
3. Step 3: Cross multiply
   345,188x = 753,131 × 753,131
4. Step 4: Simplify right side
   345,188x = 567,206,303,161
5. Step 5: Solve for x
   x = 567,206,303,161/345,188
6. Step 6: Final answer
   x = 1,643,180.83