Finding the Fourth Proportional to 13,976.30, 19,287.29 and 7,688.67

Step by Step Solution

1. Step 1: Write the proportion equation
   13,976.30 : 19,287.29 = 7,688.67 : x
2. Step 2: Convert to fraction form
   13,976.30/19,287.29 = 7,688.67/x
3. Step 3: Cross multiply
   13,976.30x = 19,287.29 × 7,688.67
4. Step 4: Simplify right side
   13,976.30x = 148,293,641.77
5. Step 5: Solve for x
   x = 148,293,641.77/13,976.30
6. Step 6: Final answer
   x = 10,610.37