Finding the Fourth Proportional to 9,869.41, 13,620.67 and 5,619.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.41 : 13,620.67 = 5,619.54 : x
2. Step 2: Convert to fraction form
   9,869.41/13,620.67 = 5,619.54/x
3. Step 3: Cross multiply
   9,869.41x = 13,620.67 × 5,619.54
4. Step 4: Simplify right side
   9,869.41x = 76,541,899.89
5. Step 5: Solve for x
   x = 76,541,899.89/9,869.41
6. Step 6: Final answer
   x = 7,755.47