Finding the Fourth Proportional to 12,488.99, 18,737.73 and 5,828.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.99 : 18,737.73 = 5,828.56 : x
2. Step 2: Convert to fraction form
   12,488.99/18,737.73 = 5,828.56/x
3. Step 3: Cross multiply
   12,488.99x = 18,737.73 × 5,828.56
4. Step 4: Simplify right side
   12,488.99x = 109,213,936.72
5. Step 5: Solve for x
   x = 109,213,936.72/12,488.99
6. Step 6: Final answer
   x = 8,744.82