Finding the Fourth Proportional to 13,989.56, 19,304.86 and 7,700.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,989.56 : 19,304.86 = 7,700.72 : x
2. Step 2: Convert to fraction form
   13,989.56/19,304.86 = 7,700.72/x
3. Step 3: Cross multiply
   13,989.56x = 19,304.86 × 7,700.72
4. Step 4: Simplify right side
   13,989.56x = 148,661,321.50
5. Step 5: Solve for x
   x = 148,661,321.50/13,989.56
6. Step 6: Final answer
   x = 10,626.59