Finding the Fourth Proportional to 9,677.61, 13,355.28 and 5,485.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,677.61 : 13,355.28 = 5,485.86 : x
2. Step 2: Convert to fraction form
   9,677.61/13,355.28 = 5,485.86/x
3. Step 3: Cross multiply
   9,677.61x = 13,355.28 × 5,485.86
4. Step 4: Simplify right side
   9,677.61x = 73,265,196.34
5. Step 5: Solve for x
   x = 73,265,196.34/9,677.61
6. Step 6: Final answer
   x = 7,570.59