Finding the Fourth Proportional to 19,139.41, 28,710.56 and 5,099.38

Step by Step Solution

1. Step 1: Write the proportion equation
   19,139.41 : 28,710.56 = 5,099.38 : x
2. Step 2: Convert to fraction form
   19,139.41/28,710.56 = 5,099.38/x
3. Step 3: Cross multiply
   19,139.41x = 28,710.56 × 5,099.38
4. Step 4: Simplify right side
   19,139.41x = 146,406,055.45
5. Step 5: Solve for x
   x = 146,406,055.45/19,139.41
6. Step 6: Final answer
   x = 7,649.45