Finding the Fourth Proportional to 9,380.21, 12,941.60 and 5,603.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.21 : 12,941.60 = 5,603.99 : x
2. Step 2: Convert to fraction form
   9,380.21/12,941.60 = 5,603.99/x
3. Step 3: Cross multiply
   9,380.21x = 12,941.60 × 5,603.99
4. Step 4: Simplify right side
   9,380.21x = 72,524,504.26
5. Step 5: Solve for x
   x = 72,524,504.26/9,380.21
6. Step 6: Final answer
   x = 7,731.65