Finding the Fourth Proportional to 9,869.82, 13,619.78 and 5,393.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.82 : 13,619.78 = 5,393.61 : x
2. Step 2: Convert to fraction form
   9,869.82/13,619.78 = 5,393.61/x
3. Step 3: Cross multiply
   9,869.82x = 13,619.78 × 5,393.61
4. Step 4: Simplify right side
   9,869.82x = 73,459,720.59
5. Step 5: Solve for x
   x = 73,459,720.59/9,869.82
6. Step 6: Final answer
   x = 7,442.86