Finding the Fourth Proportional to 15,900.33, 21,942.71 and 8,730.91

Step by Step Solution

1. Step 1: Write the proportion equation
   15,900.33 : 21,942.71 = 8,730.91 : x
2. Step 2: Convert to fraction form
   15,900.33/21,942.71 = 8,730.91/x
3. Step 3: Cross multiply
   15,900.33x = 21,942.71 × 8,730.91
4. Step 4: Simplify right side
   15,900.33x = 191,579,826.17
5. Step 5: Solve for x
   x = 191,579,826.17/15,900.33
6. Step 6: Final answer
   x = 12,048.80