Finding the Fourth Proportional to 13,976.01, 19,286.91 and 7,688.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,976.01 : 19,286.91 = 7,688.25 : x
2. Step 2: Convert to fraction form
   13,976.01/19,286.91 = 7,688.25/x
3. Step 3: Cross multiply
   13,976.01x = 19,286.91 × 7,688.25
4. Step 4: Simplify right side
   13,976.01x = 148,282,585.81
5. Step 5: Solve for x
   x = 148,282,585.81/13,976.01
6. Step 6: Final answer
   x = 10,609.79