Finding the Fourth Proportional to 10,178.78, 15,271.50 and 3,603.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,178.78 : 15,271.50 = 3,603.50 : x
2. Step 2: Convert to fraction form
   10,178.78/15,271.50 = 3,603.50/x
3. Step 3: Cross multiply
   10,178.78x = 15,271.50 × 3,603.50
4. Step 4: Simplify right side
   10,178.78x = 55,030,850.25
5. Step 5: Solve for x
   x = 55,030,850.25/10,178.78
6. Step 6: Final answer
   x = 5,406.43