Finding the Fourth Proportional to 39,702.72, 59,562.72 and 12,000

Step by Step Solution

1. Step 1: Write the proportion equation
   39,702.72 : 59,562.72 = 12,000 : x
2. Step 2: Convert to fraction form
   39,702.72/59,562.72 = 12,000/x
3. Step 3: Cross multiply
   39,702.72x = 59,562.72 × 12,000
4. Step 4: Simplify right side
   39,702.72x = 714,752,640
5. Step 5: Solve for x
   x = 714,752,640/39,702.72
6. Step 6: Final answer
   x = 18,002.61