Finding the Fourth Proportional to 13,696.72, 18,901.56 and 7,409.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,696.72 : 18,901.56 = 7,409.08 : x
2. Step 2: Convert to fraction form
   13,696.72/18,901.56 = 7,409.08/x
3. Step 3: Cross multiply
   13,696.72x = 18,901.56 × 7,409.08
4. Step 4: Simplify right side
   13,696.72x = 140,043,170.16
5. Step 5: Solve for x
   x = 140,043,170.16/13,696.72
6. Step 6: Final answer
   x = 10,224.58