Finding the Fourth Proportional to 9,788.39, 13,507.78 and 5,539.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,788.39 : 13,507.78 = 5,539.37 : x
2. Step 2: Convert to fraction form
   9,788.39/13,507.78 = 5,539.37/x
3. Step 3: Cross multiply
   9,788.39x = 13,507.78 × 5,539.37
4. Step 4: Simplify right side
   9,788.39x = 74,824,638.92
5. Step 5: Solve for x
   x = 74,824,638.92/9,788.39
6. Step 6: Final answer
   x = 7,644.23