Finding the Fourth Proportional to 9,123.54, 12,591.59 and 5,144.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.54 : 12,591.59 = 5,144.56 : x
2. Step 2: Convert to fraction form
   9,123.54/12,591.59 = 5,144.56/x
3. Step 3: Cross multiply
   9,123.54x = 12,591.59 × 5,144.56
4. Step 4: Simplify right side
   9,123.54x = 64,778,203.88
5. Step 5: Solve for x
   x = 64,778,203.88/9,123.54
6. Step 6: Final answer
   x = 7,100.12