Finding the Fourth Proportional to 7,647.98, 10,555.40 and 4,292.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,647.98 : 10,555.40 = 4,292.15 : x
2. Step 2: Convert to fraction form
   7,647.98/10,555.40 = 4,292.15/x
3. Step 3: Cross multiply
   7,647.98x = 10,555.40 × 4,292.15
4. Step 4: Simplify right side
   7,647.98x = 45,305,338.65
5. Step 5: Solve for x
   x = 45,305,338.65/7,647.98
6. Step 6: Final answer
   x = 5,923.83