Finding the Fourth Proportional to 805,203.83, 1,111,168.05 and 442,619.89

Step by Step Solution

1. Step 1: Write the proportion equation
   805,203.83 : 1,111,168.05 = 442,619.89 : x
2. Step 2: Convert to fraction form
   805,203.83/1,111,168.05 = 442,619.89/x
3. Step 3: Cross multiply
   805,203.83x = 1,111,168.05 × 442,619.89
4. Step 4: Simplify right side
   805,203.83x = 491,825,080,062.52
5. Step 5: Solve for x
   x = 491,825,080,062.52/805,203.83
6. Step 6: Final answer
   x = 610,808.17