Finding the Fourth Proportional to 9,620.73, 13,278.59 and 5,643.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,620.73 : 13,278.59 = 5,643.93 : x
2. Step 2: Convert to fraction form
   9,620.73/13,278.59 = 5,643.93/x
3. Step 3: Cross multiply
   9,620.73x = 13,278.59 × 5,643.93
4. Step 4: Simplify right side
   9,620.73x = 74,943,404.24
5. Step 5: Solve for x
   x = 74,943,404.24/9,620.73
6. Step 6: Final answer
   x = 7,789.78