Finding the Fourth Proportional to 9,961.34, 13,747.04 and 5,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,961.34 : 13,747.04 = 5,485.50 : x
2. Step 2: Convert to fraction form
   9,961.34/13,747.04 = 5,485.50/x
3. Step 3: Cross multiply
   9,961.34x = 13,747.04 × 5,485.50
4. Step 4: Simplify right side
   9,961.34x = 75,409,387.92
5. Step 5: Solve for x
   x = 75,409,387.92/9,961.34
6. Step 6: Final answer
   x = 7,570.21