Finding the Fourth Proportional to 19,139.58, 28,698.57 and 5,988.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,139.58 : 28,698.57 = 5,988.42 : x
2. Step 2: Convert to fraction form
   19,139.58/28,698.57 = 5,988.42/x
3. Step 3: Cross multiply
   19,139.58x = 28,698.57 × 5,988.42
4. Step 4: Simplify right side
   19,139.58x = 171,859,090.56
5. Step 5: Solve for x
   x = 171,859,090.56/19,139.58
6. Step 6: Final answer
   x = 8,979.25