Finding the Third Proportional to 379,405.69 and 812,897.25

Step by Step Solution

1. Step 1: Write the proportion equation
   379,405.69 : 812,897.25 = 812,897.25 : x
2. Step 2: Convert to fraction form
   379,405.69/812,897.25 = 812,897.25/x
3. Step 3: Cross multiply
   379,405.69x = 812,897.25 × 812,897.25
4. Step 4: Simplify right side
   379,405.69x = 660,801,939,057.56
5. Step 5: Solve for x
   x = 660,801,939,057.56/379,405.69
6. Step 6: Final answer
   x = 1,741,676.42