Finding the Fourth Proportional to 9,821.31, 13,553.69 and 5,345.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,821.31 : 13,553.69 = 5,345.35 : x
2. Step 2: Convert to fraction form
   9,821.31/13,553.69 = 5,345.35/x
3. Step 3: Cross multiply
   9,821.31x = 13,553.69 × 5,345.35
4. Step 4: Simplify right side
   9,821.31x = 72,449,216.84
5. Step 5: Solve for x
   x = 72,449,216.84/9,821.31
6. Step 6: Final answer
   x = 7,376.74