Finding the Fourth Proportional to 22,300.59, 30,776.18 and 12,869.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,300.59 : 30,776.18 = 12,869.76 : x
2. Step 2: Convert to fraction form
   22,300.59/30,776.18 = 12,869.76/x
3. Step 3: Cross multiply
   22,300.59x = 30,776.18 × 12,869.76
4. Step 4: Simplify right side
   22,300.59x = 396,081,985.97
5. Step 5: Solve for x
   x = 396,081,985.97/22,300.59
6. Step 6: Final answer
   x = 17,761.05