Finding the Fourth Proportional to 19,128.49, 28,694.91 and 5,089.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,128.49 : 28,694.91 = 5,089.10 : x
2. Step 2: Convert to fraction form
   19,128.49/28,694.91 = 5,089.10/x
3. Step 3: Cross multiply
   19,128.49x = 28,694.91 × 5,089.10
4. Step 4: Simplify right side
   19,128.49x = 146,031,142.09
5. Step 5: Solve for x
   x = 146,031,142.09/19,128.49
6. Step 6: Final answer
   x = 7,634.22