Finding the Fourth Proportional to 13,288.72, 18,338.28 and 7,700.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,288.72 : 18,338.28 = 7,700.24 : x
2. Step 2: Convert to fraction form
   13,288.72/18,338.28 = 7,700.24/x
3. Step 3: Cross multiply
   13,288.72x = 18,338.28 × 7,700.24
4. Step 4: Simplify right side
   13,288.72x = 141,209,157.19
5. Step 5: Solve for x
   x = 141,209,157.19/13,288.72
6. Step 6: Final answer
   x = 10,626.24