Finding the Fourth Proportional to 13,780.67, 19,007.69 and 9,308.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,780.67 : 19,007.69 = 9,308.25 : x
2. Step 2: Convert to fraction form
   13,780.67/19,007.69 = 9,308.25/x
3. Step 3: Cross multiply
   13,780.67x = 19,007.69 × 9,308.25
4. Step 4: Simplify right side
   13,780.67x = 176,928,283.90
5. Step 5: Solve for x
   x = 176,928,283.90/13,780.67
6. Step 6: Final answer
   x = 12,838.88