Finding the Fourth Proportional to 892,323.12, 1,338,386.72 and 261,243.12

Step by Step Solution

1. Step 1: Write the proportion equation
   892,323.12 : 1,338,386.72 = 261,243.12 : x
2. Step 2: Convert to fraction form
   892,323.12/1,338,386.72 = 261,243.12/x
3. Step 3: Cross multiply
   892,323.12x = 1,338,386.72 × 261,243.12
4. Step 4: Simplify right side
   892,323.12x = 349,644,322,499.37
5. Step 5: Solve for x
   x = 349,644,322,499.37/892,323.12
6. Step 6: Final answer
   x = 391,836.00