Finding the Fourth Proportional to 13,189.59, 19,787.34 and 4,424.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,189.59 : 19,787.34 = 4,424.28 : x
2. Step 2: Convert to fraction form
   13,189.59/19,787.34 = 4,424.28/x
3. Step 3: Cross multiply
   13,189.59x = 19,787.34 × 4,424.28
4. Step 4: Simplify right side
   13,189.59x = 87,544,732.62
5. Step 5: Solve for x
   x = 87,544,732.62/13,189.59
6. Step 6: Final answer
   x = 6,637.41