Finding the Fourth Proportional to 805,642.73, 1,111,764.80 and 443,066.60

Step by Step Solution

1. Step 1: Write the proportion equation
   805,642.73 : 1,111,764.80 = 443,066.60 : x
2. Step 2: Convert to fraction form
   805,642.73/1,111,764.80 = 443,066.60/x
3. Step 3: Cross multiply
   805,642.73x = 1,111,764.80 × 443,066.60
4. Step 4: Simplify right side
   805,642.73x = 492,585,850,499.76
5. Step 5: Solve for x
   x = 492,585,850,499.76/805,642.73
6. Step 6: Final answer
   x = 611,419.72