Finding the Fourth Proportional to 592,978.49, 818,300.40 and 321,044.18

Step by Step Solution

1. Step 1: Write the proportion equation
   592,978.49 : 818,300.40 = 321,044.18 : x
2. Step 2: Convert to fraction form
   592,978.49/818,300.40 = 321,044.18/x
3. Step 3: Cross multiply
   592,978.49x = 818,300.40 × 321,044.18
4. Step 4: Simplify right side
   592,978.49x = 262,710,580,911.67
5. Step 5: Solve for x
   x = 262,710,580,911.67/592,978.49
6. Step 6: Final answer
   x = 443,035.60