Finding the Fourth Proportional to 12,696.50, 19,053.40 and 4,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,696.50 : 19,053.40 = 4,488.50 : x
2. Step 2: Convert to fraction form
   12,696.50/19,053.40 = 4,488.50/x
3. Step 3: Cross multiply
   12,696.50x = 19,053.40 × 4,488.50
4. Step 4: Simplify right side
   12,696.50x = 85,521,185.90
5. Step 5: Solve for x
   x = 85,521,185.90/12,696.50
6. Step 6: Final answer
   x = 6,735.81