Finding the Fourth Proportional to 1,214,499.69, 1,819,431.32 and 680,405.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,214,499.69 : 1,819,431.32 = 680,405.13 : x
2. Step 2: Convert to fraction form
   1,214,499.69/1,819,431.32 = 680,405.13/x
3. Step 3: Cross multiply
   1,214,499.69x = 1,819,431.32 × 680,405.13
4. Step 4: Simplify right side
   1,214,499.69x = 1,237,950,400,408.65
5. Step 5: Solve for x
   x = 1,237,950,400,408.65/1,214,499.69
6. Step 6: Final answer
   x = 1,019,308.95