Finding the Fourth Proportional to 9,868.41, 13,618.94 and 5,620.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,868.41 : 13,618.94 = 5,620.80 : x
2. Step 2: Convert to fraction form
   9,868.41/13,618.94 = 5,620.80/x
3. Step 3: Cross multiply
   9,868.41x = 13,618.94 × 5,620.80
4. Step 4: Simplify right side
   9,868.41x = 76,549,411.88
5. Step 5: Solve for x
   x = 76,549,411.88/9,868.41
6. Step 6: Final answer
   x = 7,757.02