Finding the Fourth Proportional to 9,123.44, 12,590.35 and 5,144.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.44 : 12,590.35 = 5,144.54 : x
2. Step 2: Convert to fraction form
   9,123.44/12,590.35 = 5,144.54/x
3. Step 3: Cross multiply
   9,123.44x = 12,590.35 × 5,144.54
4. Step 4: Simplify right side
   9,123.44x = 64,771,483.38
5. Step 5: Solve for x
   x = 64,771,483.38/9,123.44
6. Step 6: Final answer
   x = 7,099.46