Finding the Fourth Proportional to 13,674.72, 18,870.84 and 7,706.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,674.72 : 18,870.84 = 7,706.28 : x
2. Step 2: Convert to fraction form
   13,674.72/18,870.84 = 7,706.28/x
3. Step 3: Cross multiply
   13,674.72x = 18,870.84 × 7,706.28
4. Step 4: Simplify right side
   13,674.72x = 145,423,976.88
5. Step 5: Solve for x
   x = 145,423,976.88/13,674.72
6. Step 6: Final answer
   x = 10,634.51