Finding the Fourth Proportional to 19,456.39, 29,184.18 and 13,200.76

Step by Step Solution

1. Step 1: Write the proportion equation
   19,456.39 : 29,184.18 = 13,200.76 : x
2. Step 2: Convert to fraction form
   19,456.39/29,184.18 = 13,200.76/x
3. Step 3: Cross multiply
   19,456.39x = 29,184.18 × 13,200.76
4. Step 4: Simplify right side
   19,456.39x = 385,253,355.98
5. Step 5: Solve for x
   x = 385,253,355.98/19,456.39
6. Step 6: Final answer
   x = 19,800.87