Finding the Fourth Proportional to 9,578.56, 13,219.98 and 5,598.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,578.56 : 13,219.98 = 5,598.90 : x
2. Step 2: Convert to fraction form
   9,578.56/13,219.98 = 5,598.90/x
3. Step 3: Cross multiply
   9,578.56x = 13,219.98 × 5,598.90
4. Step 4: Simplify right side
   9,578.56x = 74,017,346.02
5. Step 5: Solve for x
   x = 74,017,346.02/9,578.56
6. Step 6: Final answer
   x = 7,727.40