Finding the Fourth Proportional to 12,390.34, 18,587.46 and 4,068.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.34 : 18,587.46 = 4,068.47 : x
2. Step 2: Convert to fraction form
   12,390.34/18,587.46 = 4,068.47/x
3. Step 3: Cross multiply
   12,390.34x = 18,587.46 × 4,068.47
4. Step 4: Simplify right side
   12,390.34x = 75,622,422.95
5. Step 5: Solve for x
   x = 75,622,422.95/12,390.34
6. Step 6: Final answer
   x = 6,103.34