Finding the Fourth Proportional to 18,339.30, 27,505.89 and 5,188.41

Step by Step Solution

1. Step 1: Write the proportion equation
   18,339.30 : 27,505.89 = 5,188.41 : x
2. Step 2: Convert to fraction form
   18,339.30/27,505.89 = 5,188.41/x
3. Step 3: Cross multiply
   18,339.30x = 27,505.89 × 5,188.41
4. Step 4: Simplify right side
   18,339.30x = 142,711,834.73
5. Step 5: Solve for x
   x = 142,711,834.73/18,339.30
6. Step 6: Final answer
   x = 7,781.75