Finding the Fourth Proportional to 9,103.60, 12,556.20 and 5,377.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,103.60 : 12,556.20 = 5,377.60 : x
2. Step 2: Convert to fraction form
   9,103.60/12,556.20 = 5,377.60/x
3. Step 3: Cross multiply
   9,103.60x = 12,556.20 × 5,377.60
4. Step 4: Simplify right side
   9,103.60x = 67,522,221.12
5. Step 5: Solve for x
   x = 67,522,221.12/9,103.60
6. Step 6: Final answer
   x = 7,417.09