Finding the Fourth Proportional to 9,839.68, 13,579.01 and 5,590.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,839.68 : 13,579.01 = 5,590.60 : x
2. Step 2: Convert to fraction form
   9,839.68/13,579.01 = 5,590.60/x
3. Step 3: Cross multiply
   9,839.68x = 13,579.01 × 5,590.60
4. Step 4: Simplify right side
   9,839.68x = 75,914,813.31
5. Step 5: Solve for x
   x = 75,914,813.31/9,839.68
6. Step 6: Final answer
   x = 7,715.17