Finding the Fourth Proportional to 12,143.34, 18,209.91 and 5,126.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,143.34 : 18,209.91 = 5,126.52 : x
2. Step 2: Convert to fraction form
   12,143.34/18,209.91 = 5,126.52/x
3. Step 3: Cross multiply
   12,143.34x = 18,209.91 × 5,126.52
4. Step 4: Simplify right side
   12,143.34x = 93,353,467.81
5. Step 5: Solve for x
   x = 93,353,467.81/12,143.34
6. Step 6: Final answer
   x = 7,687.63