Finding the Fourth Proportional to 19,235.72, 28,855.20 and 5,384.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,235.72 : 28,855.20 = 5,384.72 : x
2. Step 2: Convert to fraction form
   19,235.72/28,855.20 = 5,384.72/x
3. Step 3: Cross multiply
   19,235.72x = 28,855.20 × 5,384.72
4. Step 4: Simplify right side
   19,235.72x = 155,377,172.54
5. Step 5: Solve for x
   x = 155,377,172.54/19,235.72
6. Step 6: Final answer
   x = 8,077.53