Finding the Third Proportional to 345,186 and 753,126.75

Step by Step Solution

1. Step 1: Write the proportion equation
   345,186 : 753,126.75 = 753,126.75 : x
2. Step 2: Convert to fraction form
   345,186/753,126.75 = 753,126.75/x
3. Step 3: Cross multiply
   345,186x = 753,126.75 × 753,126.75
4. Step 4: Simplify right side
   345,186x = 567,199,901,565.56
5. Step 5: Solve for x
   x = 567,199,901,565.56/345,186
6. Step 6: Final answer
   x = 1,643,171.80