Finding the Fourth Proportional to 22,300.64, 30,777.54 and 12,869

Step by Step Solution

1. Step 1: Write the proportion equation
   22,300.64 : 30,777.54 = 12,869 : x
2. Step 2: Convert to fraction form
   22,300.64/30,777.54 = 12,869/x
3. Step 3: Cross multiply
   22,300.64x = 30,777.54 × 12,869
4. Step 4: Simplify right side
   22,300.64x = 396,076,162.26
5. Step 5: Solve for x
   x = 396,076,162.26/22,300.64
6. Step 6: Final answer
   x = 17,760.75