Finding the Fourth Proportional to 804,665.40, 1,110,456.78 and 442,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   804,665.40 : 1,110,456.78 = 442,111.88 : x
2. Step 2: Convert to fraction form
   804,665.40/1,110,456.78 = 442,111.88/x
3. Step 3: Cross multiply
   804,665.40x = 1,110,456.78 × 442,111.88
4. Step 4: Simplify right side
   804,665.40x = 490,946,134,664.55
5. Step 5: Solve for x
   x = 490,946,134,664.55/804,665.40
6. Step 6: Final answer
   x = 610,124.57