Finding the Fourth Proportional to 9,622.94, 13,279.72 and 5,644.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,622.94 : 13,279.72 = 5,644.12 : x
2. Step 2: Convert to fraction form
   9,622.94/13,279.72 = 5,644.12/x
3. Step 3: Cross multiply
   9,622.94x = 13,279.72 × 5,644.12
4. Step 4: Simplify right side
   9,622.94x = 74,952,333.25
5. Step 5: Solve for x
   x = 74,952,333.25/9,622.94
6. Step 6: Final answer
   x = 7,788.92