Finding the Fourth Proportional to 10,875.78, 16,313.25 and 3,480.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,875.78 : 16,313.25 = 3,480.03 : x
2. Step 2: Convert to fraction form
   10,875.78/16,313.25 = 3,480.03/x
3. Step 3: Cross multiply
   10,875.78x = 16,313.25 × 3,480.03
4. Step 4: Simplify right side
   10,875.78x = 56,770,599.40
5. Step 5: Solve for x
   x = 56,770,599.40/10,875.78
6. Step 6: Final answer
   x = 5,219.91