Finding the Fourth Proportional to 19,139.50, 28,709.37 and 5,288.62

Step by Step Solution

1. Step 1: Write the proportion equation
   19,139.50 : 28,709.37 = 5,288.62 : x
2. Step 2: Convert to fraction form
   19,139.50/28,709.37 = 5,288.62/x
3. Step 3: Cross multiply
   19,139.50x = 28,709.37 × 5,288.62
4. Step 4: Simplify right side
   19,139.50x = 151,832,948.37
5. Step 5: Solve for x
   x = 151,832,948.37/19,139.50
6. Step 6: Final answer
   x = 7,932.96