Finding the Fourth Proportional to 7,755.57, 10,702.46 and 4,218.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,755.57 : 10,702.46 = 4,218.69 : x
2. Step 2: Convert to fraction form
   7,755.57/10,702.46 = 4,218.69/x
3. Step 3: Cross multiply
   7,755.57x = 10,702.46 × 4,218.69
4. Step 4: Simplify right side
   7,755.57x = 45,150,339.88
5. Step 5: Solve for x
   x = 45,150,339.88/7,755.57
6. Step 6: Final answer
   x = 5,821.67