Finding the Fourth Proportional to 9,581.10, 13,219.34 and 5,603.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,581.10 : 13,219.34 = 5,603.20 : x
2. Step 2: Convert to fraction form
   9,581.10/13,219.34 = 5,603.20/x
3. Step 3: Cross multiply
   9,581.10x = 13,219.34 × 5,603.20
4. Step 4: Simplify right side
   9,581.10x = 74,070,605.89
5. Step 5: Solve for x
   x = 74,070,605.89/9,581.10
6. Step 6: Final answer
   x = 7,730.91