Finding the Fourth Proportional to 19,128.14, 28,499.96 and 18,053.82

Step by Step Solution

1. Step 1: Write the proportion equation
   19,128.14 : 28,499.96 = 18,053.82 : x
2. Step 2: Convert to fraction form
   19,128.14/28,499.96 = 18,053.82/x
3. Step 3: Cross multiply
   19,128.14x = 28,499.96 × 18,053.82
4. Step 4: Simplify right side
   19,128.14x = 514,533,147.85
5. Step 5: Solve for x
   x = 514,533,147.85/19,128.14
6. Step 6: Final answer
   x = 26,899.28