Finding the Fourth Proportional to 19,287.59, 28,901.61 and 13,023.05

Step by Step Solution

1. Step 1: Write the proportion equation
   19,287.59 : 28,901.61 = 13,023.05 : x
2. Step 2: Convert to fraction form
   19,287.59/28,901.61 = 13,023.05/x
3. Step 3: Cross multiply
   19,287.59x = 28,901.61 × 13,023.05
4. Step 4: Simplify right side
   19,287.59x = 376,386,967.60
5. Step 5: Solve for x
   x = 376,386,967.60/19,287.59
6. Step 6: Final answer
   x = 19,514.47