Finding the Fourth Proportional to 13,919.50, 19,208.91 and 7,631.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,919.50 : 19,208.91 = 7,631.88 : x
2. Step 2: Convert to fraction form
   13,919.50/19,208.91 = 7,631.88/x
3. Step 3: Cross multiply
   13,919.50x = 19,208.91 × 7,631.88
4. Step 4: Simplify right side
   13,919.50x = 146,600,096.05
5. Step 5: Solve for x
   x = 146,600,096.05/13,919.50
6. Step 6: Final answer
   x = 10,531.99