Finding the Third Proportional to 775,685 and 1,200,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   775,685 : 1,200,391.50 = 1,200,391.50 : x
2. Step 2: Convert to fraction form
   775,685/1,200,391.50 = 1,200,391.50/x
3. Step 3: Cross multiply
   775,685x = 1,200,391.50 × 1,200,391.50
4. Step 4: Simplify right side
   775,685x = 1,440,939,753,272.25
5. Step 5: Solve for x
   x = 1,440,939,753,272.25/775,685
6. Step 6: Final answer
   x = 1,857,635.19