Finding the Fourth Proportional to 22,300.76, 30,774.80 and 12,869.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,300.76 : 30,774.80 = 12,869.12 : x
2. Step 2: Convert to fraction form
   22,300.76/30,774.80 = 12,869.12/x
3. Step 3: Cross multiply
   22,300.76x = 30,774.80 × 12,869.12
4. Step 4: Simplify right side
   22,300.76x = 396,044,529.83
5. Step 5: Solve for x
   x = 396,044,529.83/22,300.76
6. Step 6: Final answer
   x = 17,759.24