Finding the Fourth Proportional to 19,086.52, 26,327.28 and 13,789.12

Step by Step Solution

1. Step 1: Write the proportion equation
   19,086.52 : 26,327.28 = 13,789.12 : x
2. Step 2: Convert to fraction form
   19,086.52/26,327.28 = 13,789.12/x
3. Step 3: Cross multiply
   19,086.52x = 26,327.28 × 13,789.12
4. Step 4: Simplify right side
   19,086.52x = 363,030,023.19
5. Step 5: Solve for x
   x = 363,030,023.19/19,086.52
6. Step 6: Final answer
   x = 19,020.23