Finding the Fourth Proportional to 22,302.75, 30,777.77 and 12,871.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,302.75 : 30,777.77 = 12,871.32 : x
2. Step 2: Convert to fraction form
   22,302.75/30,777.77 = 12,871.32/x
3. Step 3: Cross multiply
   22,302.75x = 30,777.77 × 12,871.32
4. Step 4: Simplify right side
   22,302.75x = 396,150,308.31
5. Step 5: Solve for x
   x = 396,150,308.31/22,302.75
6. Step 6: Final answer
   x = 17,762.40