Finding the Fourth Proportional to 9,353.75, 12,909.83 and 5,577.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,353.75 : 12,909.83 = 5,577.15 : x
2. Step 2: Convert to fraction form
   9,353.75/12,909.83 = 5,577.15/x
3. Step 3: Cross multiply
   9,353.75x = 12,909.83 × 5,577.15
4. Step 4: Simplify right side
   9,353.75x = 72,000,030.50
5. Step 5: Solve for x
   x = 72,000,030.50/9,353.75
6. Step 6: Final answer
   x = 7,697.45