Finding the Fourth Proportional to 13,311, 19,932.39 and 12,916.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311 : 19,932.39 = 12,916.82 : x
2. Step 2: Convert to fraction form
   13,311/19,932.39 = 12,916.82/x
3. Step 3: Cross multiply
   13,311x = 19,932.39 × 12,916.82
4. Step 4: Simplify right side
   13,311x = 257,462,994.14
5. Step 5: Solve for x
   x = 257,462,994.14/13,311
6. Step 6: Final answer
   x = 19,342.12