Finding the Fourth Proportional to 9,821.98, 13,554.37 and 5,345.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,821.98 : 13,554.37 = 5,345.79 : x
2. Step 2: Convert to fraction form
   9,821.98/13,554.37 = 5,345.79/x
3. Step 3: Cross multiply
   9,821.98x = 13,554.37 × 5,345.79
4. Step 4: Simplify right side
   9,821.98x = 72,458,815.60
5. Step 5: Solve for x
   x = 72,458,815.60/9,821.98
6. Step 6: Final answer
   x = 7,377.21