Finding the Fourth Proportional to 1,538,131.36, 2,307,462.72 and 685,505.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538,131.36 : 2,307,462.72 = 685,505.92 : x
2. Step 2: Convert to fraction form
   1,538,131.36/2,307,462.72 = 685,505.92/x
3. Step 3: Cross multiply
   1,538,131.36x = 2,307,462.72 × 685,505.92
4. Step 4: Simplify right side
   1,538,131.36x = 1,581,779,354,739.30
5. Step 5: Solve for x
   x = 1,581,779,354,739.30/1,538,131.36
6. Step 6: Final answer
   x = 1,028,377.29