Finding the Fourth Proportional to 9,341.82, 12,916.31 and 8,928.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,341.82 : 12,916.31 = 8,928.72 : x
2. Step 2: Convert to fraction form
   9,341.82/12,916.31 = 8,928.72/x
3. Step 3: Cross multiply
   9,341.82x = 12,916.31 × 8,928.72
4. Step 4: Simplify right side
   9,341.82x = 115,326,070.78
5. Step 5: Solve for x
   x = 115,326,070.78/9,341.82
6. Step 6: Final answer
   x = 12,345.14