Finding the Fourth Proportional to 9,620.54, 13,279.68 and 5,643.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.54 : 13,279.68 = 5,643.02 : x
2. Step 2: Convert to fraction form
   9,620.54/13,279.68 = 5,643.02/x
3. Step 3: Cross multiply
   9,620.54x = 13,279.68 × 5,643.02
4. Step 4: Simplify right side
   9,620.54x = 74,937,499.83
5. Step 5: Solve for x
   x = 74,937,499.83/9,620.54
6. Step 6: Final answer
   x = 7,789.32