Finding the Fourth Proportional to 8,702.61, 12,000.78 and 7,447.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,702.61 : 12,000.78 = 7,447.83 : x
2. Step 2: Convert to fraction form
   8,702.61/12,000.78 = 7,447.83/x
3. Step 3: Cross multiply
   8,702.61x = 12,000.78 × 7,447.83
4. Step 4: Simplify right side
   8,702.61x = 89,379,769.31
5. Step 5: Solve for x
   x = 89,379,769.31/8,702.61
6. Step 6: Final answer
   x = 10,270.46