Finding the Third Proportional to 345,222 and 740,172

Step by Step Solution

1. Step 1: Write the proportion equation
   345,222 : 740,172 = 740,172 : x
2. Step 2: Convert to fraction form
   345,222/740,172 = 740,172/x
3. Step 3: Cross multiply
   345,222x = 740,172 × 740,172
4. Step 4: Simplify right side
   345,222x = 547,854,589,584
5. Step 5: Solve for x
   x = 547,854,589,584/345,222
6. Step 6: Final answer
   x = 1,586,963.14