Finding the Fourth Proportional to 13,444.34, 20,123.37 and 7,188.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,444.34 : 20,123.37 = 7,188.71 : x
2. Step 2: Convert to fraction form
   13,444.34/20,123.37 = 7,188.71/x
3. Step 3: Cross multiply
   13,444.34x = 20,123.37 × 7,188.71
4. Step 4: Simplify right side
   13,444.34x = 144,660,970.54
5. Step 5: Solve for x
   x = 144,660,970.54/13,444.34
6. Step 6: Final answer
   x = 10,759.99