Finding the Fourth Proportional to 19,178.69, 28,756.67 and 7,478.24

Step by Step Solution

1. Step 1: Write the proportion equation
   19,178.69 : 28,756.67 = 7,478.24 : x
2. Step 2: Convert to fraction form
   19,178.69/28,756.67 = 7,478.24/x
3. Step 3: Cross multiply
   19,178.69x = 28,756.67 × 7,478.24
4. Step 4: Simplify right side
   19,178.69x = 215,049,098.69
5. Step 5: Solve for x
   x = 215,049,098.69/19,178.69
6. Step 6: Final answer
   x = 11,212.92