Finding the Fourth Proportional to 805,659.91, 1,111,838.61 and 443,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   805,659.91 : 1,111,838.61 = 443,111.20 : x
2. Step 2: Convert to fraction form
   805,659.91/1,111,838.61 = 443,111.20/x
3. Step 3: Cross multiply
   805,659.91x = 1,111,838.61 × 443,111.20
4. Step 4: Simplify right side
   805,659.91x = 492,668,140,683.43
5. Step 5: Solve for x
   x = 492,668,140,683.43/805,659.91
6. Step 6: Final answer
   x = 611,508.82