Finding the Fourth Proportional to 9,621.73, 13,279.97 and 5,644.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.73 : 13,279.97 = 5,644.93 : x
2. Step 2: Convert to fraction form
   9,621.73/13,279.97 = 5,644.93/x
3. Step 3: Cross multiply
   9,621.73x = 13,279.97 × 5,644.93
4. Step 4: Simplify right side
   9,621.73x = 74,964,501.05
5. Step 5: Solve for x
   x = 74,964,501.05/9,621.73
6. Step 6: Final answer
   x = 7,791.17