Finding the Fourth Proportional to 13,665.32, 18,857.76 and 7,696.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,665.32 : 18,857.76 = 7,696.86 : x
2. Step 2: Convert to fraction form
   13,665.32/18,857.76 = 7,696.86/x
3. Step 3: Cross multiply
   13,665.32x = 18,857.76 × 7,696.86
4. Step 4: Simplify right side
   13,665.32x = 145,145,439.05
5. Step 5: Solve for x
   x = 145,145,439.05/13,665.32
6. Step 6: Final answer
   x = 10,621.45