Finding the Fourth Proportional to 19,013.58, 28,513.08 and 13,152.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,013.58 : 28,513.08 = 13,152.42 : x
2. Step 2: Convert to fraction form
   19,013.58/28,513.08 = 13,152.42/x
3. Step 3: Cross multiply
   19,013.58x = 28,513.08 × 13,152.42
4. Step 4: Simplify right side
   19,013.58x = 375,016,003.65
5. Step 5: Solve for x
   x = 375,016,003.65/19,013.58
6. Step 6: Final answer
   x = 19,723.59