Finding the Fourth Proportional to 13,991.28, 19,308.33 and 7,704.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,991.28 : 19,308.33 = 7,704.06 : x
2. Step 2: Convert to fraction form
   13,991.28/19,308.33 = 7,704.06/x
3. Step 3: Cross multiply
   13,991.28x = 19,308.33 × 7,704.06
4. Step 4: Simplify right side
   13,991.28x = 148,752,532.82
5. Step 5: Solve for x
   x = 148,752,532.82/13,991.28
6. Step 6: Final answer
   x = 10,631.80