Finding the Fourth Proportional to 13,986.56, 19,300.72 and 7,697.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,986.56 : 19,300.72 = 7,697.72 : x
2. Step 2: Convert to fraction form
   13,986.56/19,300.72 = 7,697.72/x
3. Step 3: Cross multiply
   13,986.56x = 19,300.72 × 7,697.72
4. Step 4: Simplify right side
   13,986.56x = 148,571,538.36
5. Step 5: Solve for x
   x = 148,571,538.36/13,986.56
6. Step 6: Final answer
   x = 10,622.45