Finding the Fourth Proportional to 22,446.31, 30,975.71 and 12,887.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,446.31 : 30,975.71 = 12,887.76 : x
2. Step 2: Convert to fraction form
   22,446.31/30,975.71 = 12,887.76/x
3. Step 3: Cross multiply
   22,446.31x = 30,975.71 × 12,887.76
4. Step 4: Simplify right side
   22,446.31x = 399,207,516.31
5. Step 5: Solve for x
   x = 399,207,516.31/22,446.31
6. Step 6: Final answer
   x = 17,785.00