Finding the Fourth Proportional to 12,031.39, 18,048.37 and 3,146.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,031.39 : 18,048.37 = 3,146.85 : x
2. Step 2: Convert to fraction form
   12,031.39/18,048.37 = 3,146.85/x
3. Step 3: Cross multiply
   12,031.39x = 18,048.37 × 3,146.85
4. Step 4: Simplify right side
   12,031.39x = 56,795,511.17
5. Step 5: Solve for x
   x = 56,795,511.17/12,031.39
6. Step 6: Final answer
   x = 4,720.61