Finding the Fourth Proportional to 892,978.08, 1,339,477.56 and 261,904.56

Step by Step Solution

1. Step 1: Write the proportion equation
   892,978.08 : 1,339,477.56 = 261,904.56 : x
2. Step 2: Convert to fraction form
   892,978.08/1,339,477.56 = 261,904.56/x
3. Step 3: Cross multiply
   892,978.08x = 1,339,477.56 × 261,904.56
4. Step 4: Simplify right side
   892,978.08x = 350,815,280,981.67
5. Step 5: Solve for x
   x = 350,815,280,981.67/892,978.08
6. Step 6: Final answer
   x = 392,859.90