Finding the Fourth Proportional to 443,368.20, 611,628.89 and 261,992.37

Step by Step Solution

1. Step 1: Write the proportion equation
   443,368.20 : 611,628.89 = 261,992.37 : x
2. Step 2: Convert to fraction form
   443,368.20/611,628.89 = 261,992.37/x
3. Step 3: Cross multiply
   443,368.20x = 611,628.89 × 261,992.37
4. Step 4: Simplify right side
   443,368.20x = 160,242,101,141.61
5. Step 5: Solve for x
   x = 160,242,101,141.61/443,368.20
6. Step 6: Final answer
   x = 361,419.92