Finding the Fourth Proportional to 12,916.82, 19,345.31 and 11,022.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,916.82 : 19,345.31 = 11,022.10 : x
2. Step 2: Convert to fraction form
   12,916.82/19,345.31 = 11,022.10/x
3. Step 3: Cross multiply
   12,916.82x = 19,345.31 × 11,022.10
4. Step 4: Simplify right side
   12,916.82x = 213,225,941.35
5. Step 5: Solve for x
   x = 213,225,941.35/12,916.82
6. Step 6: Final answer
   x = 16,507.62