Finding the Fourth Proportional to 12,742.49, 17,588.27 and 7,440.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,742.49 : 17,588.27 = 7,440.23 : x
2. Step 2: Convert to fraction form
   12,742.49/17,588.27 = 7,440.23/x
3. Step 3: Cross multiply
   12,742.49x = 17,588.27 × 7,440.23
4. Step 4: Simplify right side
   12,742.49x = 130,860,774.10
5. Step 5: Solve for x
   x = 130,860,774.10/12,742.49
6. Step 6: Final answer
   x = 10,269.64