Finding the Fourth Proportional to 11,152.48, 15,377.92 and 7,617.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,152.48 : 15,377.92 = 7,617.60 : x
2. Step 2: Convert to fraction form
   11,152.48/15,377.92 = 7,617.60/x
3. Step 3: Cross multiply
   11,152.48x = 15,377.92 × 7,617.60
4. Step 4: Simplify right side
   11,152.48x = 117,142,843.39
5. Step 5: Solve for x
   x = 117,142,843.39/11,152.48
6. Step 6: Final answer
   x = 10,503.75