Finding the Fourth Proportional to 9,869.48, 13,619.93 and 5,393.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,869.48 : 13,619.93 = 5,393.31 : x
2. Step 2: Convert to fraction form
   9,869.48/13,619.93 = 5,393.31/x
3. Step 3: Cross multiply
   9,869.48x = 13,619.93 × 5,393.31
4. Step 4: Simplify right side
   9,869.48x = 73,456,504.67
5. Step 5: Solve for x
   x = 73,456,504.67/9,869.48
6. Step 6: Final answer
   x = 7,442.79