Finding the Fourth Proportional to 805,806.80, 1,112,042.61 and 443,258.69

Step by Step Solution

1. Step 1: Write the proportion equation
   805,806.80 : 1,112,042.61 = 443,258.69 : x
2. Step 2: Convert to fraction form
   805,806.80/1,112,042.61 = 443,258.69/x
3. Step 3: Cross multiply
   805,806.80x = 1,112,042.61 × 443,258.69
4. Step 4: Simplify right side
   805,806.80x = 492,922,553,312.89
5. Step 5: Solve for x
   x = 492,922,553,312.89/805,806.80
6. Step 6: Final answer
   x = 611,713.08