Finding the Fourth Proportional to 9,123.17, 12,590.06 and 5,144.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.17 : 12,590.06 = 5,144.39 : x
2. Step 2: Convert to fraction form
   9,123.17/12,590.06 = 5,144.39/x
3. Step 3: Cross multiply
   9,123.17x = 12,590.06 × 5,144.39
4. Step 4: Simplify right side
   9,123.17x = 64,768,090.09
5. Step 5: Solve for x
   x = 64,768,090.09/9,123.17
6. Step 6: Final answer
   x = 7,099.29