Finding the Fourth Proportional to 1,315,729.86, 1,815,722.07 and 771,874.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315,729.86 : 1,815,722.07 = 771,874.91 : x
2. Step 2: Convert to fraction form
   1,315,729.86/1,815,722.07 = 771,874.91/x
3. Step 3: Cross multiply
   1,315,729.86x = 1,815,722.07 × 771,874.91
4. Step 4: Simplify right side
   1,315,729.86x = 1,401,510,300,287.65
5. Step 5: Solve for x
   x = 1,401,510,300,287.65/1,315,729.86
6. Step 6: Final answer
   x = 1,065,196.09