Finding the Fourth Proportional to 9,961.69, 13,747.23 and 5,485.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,961.69 : 13,747.23 = 5,485.86 : x
2. Step 2: Convert to fraction form
   9,961.69/13,747.23 = 5,485.86/x
3. Step 3: Cross multiply
   9,961.69x = 13,747.23 × 5,485.86
4. Step 4: Simplify right side
   9,961.69x = 75,415,358.51
5. Step 5: Solve for x
   x = 75,415,358.51/9,961.69
6. Step 6: Final answer
   x = 7,570.54