Finding the Fourth Proportional to 9,123.63, 12,591.02 and 5,144.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.63 : 12,591.02 = 5,144.73 : x
2. Step 2: Convert to fraction form
   9,123.63/12,591.02 = 5,144.73/x
3. Step 3: Cross multiply
   9,123.63x = 12,591.02 × 5,144.73
4. Step 4: Simplify right side
   9,123.63x = 64,777,398.32
5. Step 5: Solve for x
   x = 64,777,398.32/9,123.63
6. Step 6: Final answer
   x = 7,099.96