Finding the Fourth Proportional to 9,861.20, 13,608.52 and 5,384.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.20 : 13,608.52 = 5,384.98 : x
2. Step 2: Convert to fraction form
   9,861.20/13,608.52 = 5,384.98/x
3. Step 3: Cross multiply
   9,861.20x = 13,608.52 × 5,384.98
4. Step 4: Simplify right side
   9,861.20x = 73,281,608.03
5. Step 5: Solve for x
   x = 73,281,608.03/9,861.20
6. Step 6: Final answer
   x = 7,431.31