Finding the Fourth Proportional to 16,878.27, 23,278.73 and 15,746.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,878.27 : 23,278.73 = 15,746.50 : x
2. Step 2: Convert to fraction form
   16,878.27/23,278.73 = 15,746.50/x
3. Step 3: Cross multiply
   16,878.27x = 23,278.73 × 15,746.50
4. Step 4: Simplify right side
   16,878.27x = 366,558,326.82
5. Step 5: Solve for x
   x = 366,558,326.82/16,878.27
6. Step 6: Final answer
   x = 21,717.77