Finding the Fourth Proportional to 9,435.50, 13,021.11 and 5,187.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,435.50 : 13,021.11 = 5,187.02 : x
2. Step 2: Convert to fraction form
   9,435.50/13,021.11 = 5,187.02/x
3. Step 3: Cross multiply
   9,435.50x = 13,021.11 × 5,187.02
4. Step 4: Simplify right side
   9,435.50x = 67,540,692.89
5. Step 5: Solve for x
   x = 67,540,692.89/9,435.50
6. Step 6: Final answer
   x = 7,158.15