Finding the Fourth Proportional to 805,308, 1,111,296.72 and 442,729.20

Step by Step Solution

1. Step 1: Write the proportion equation
   805,308 : 1,111,296.72 = 442,729.20 : x
2. Step 2: Convert to fraction form
   805,308/1,111,296.72 = 442,729.20/x
3. Step 3: Cross multiply
   805,308x = 1,111,296.72 × 442,729.20
4. Step 4: Simplify right side
   805,308x = 492,003,507,808.22
5. Step 5: Solve for x
   x = 492,003,507,808.22/805,308
6. Step 6: Final answer
   x = 610,950.73