Finding the Fourth Proportional to 7,503.94, 10,355.90 and 5,380.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,503.94 : 10,355.90 = 5,380.12 : x
2. Step 2: Convert to fraction form
   7,503.94/10,355.90 = 5,380.12/x
3. Step 3: Cross multiply
   7,503.94x = 10,355.90 × 5,380.12
4. Step 4: Simplify right side
   7,503.94x = 55,715,984.71
5. Step 5: Solve for x
   x = 55,715,984.71/7,503.94
6. Step 6: Final answer
   x = 7,424.90