Finding the Fourth Proportional to 22,287.73, 30,761.64 and 12,855.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,287.73 : 30,761.64 = 12,855.01 : x
2. Step 2: Convert to fraction form
   22,287.73/30,761.64 = 12,855.01/x
3. Step 3: Cross multiply
   22,287.73x = 30,761.64 × 12,855.01
4. Step 4: Simplify right side
   22,287.73x = 395,441,189.82
5. Step 5: Solve for x
   x = 395,441,189.82/22,287.73
6. Step 6: Final answer
   x = 17,742.55