Finding the Fourth Proportional to 19,916.82, 27,485.39 and 10,964.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,916.82 : 27,485.39 = 10,964.50 : x
2. Step 2: Convert to fraction form
   19,916.82/27,485.39 = 10,964.50/x
3. Step 3: Cross multiply
   19,916.82x = 27,485.39 × 10,964.50
4. Step 4: Simplify right side
   19,916.82x = 301,363,517.35
5. Step 5: Solve for x
   x = 301,363,517.35/19,916.82
6. Step 6: Final answer
   x = 15,131.11