Finding the Fourth Proportional to 12,756.60, 19,137.24 and 3,989.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,756.60 : 19,137.24 = 3,989.52 : x
2. Step 2: Convert to fraction form
   12,756.60/19,137.24 = 3,989.52/x
3. Step 3: Cross multiply
   12,756.60x = 19,137.24 × 3,989.52
4. Step 4: Simplify right side
   12,756.60x = 76,348,401.72
5. Step 5: Solve for x
   x = 76,348,401.72/12,756.60
6. Step 6: Final answer
   x = 5,985.01